Know The difference between a 1n and 2n cell
Answers
In 1n cell chromosome number is 23 and in 2n cell chromosome number is 46.
An individual set of chromosomes, or haploid, is present in each cell. Haploid refers to the number of chromosomes in gametes, which are also known as egg or sperm cells.Human gametes are haploid cells with 23 chromosomes, one of each pair found in diplod cells, and they are made up entirely with chromosomes that are not found in other haploid cells.
When an organism's cells contain two full sets of chromosomes, with one chromosome from each parent present in each pair, the organism is said to be diploid.Humans contain 23 pairs of chromosomes in most of their cells because they are diploid.
The number of chromosomes in somatic (body) cells of sexually reproducing animals is normally diploid, which is twice as many as the haploid (1n) amount found in the gametes. During meiosis, the haploid number is generated.
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Related Questions
In which organism can cell walls be found?
Answers
Answer:
Cell walls are structures that surround and protect the cells of some organisms. According to the web page context, cell walls can be found in:
PlantsFungiBacteriaSome protistsCell walls are not found in animals or most protists.
The macromolecule pictured above could be apart of which of the following?
Answers
The macromolecule pictured above is Fat. Option B is correct.
Fats are composed of glycerol, a type of monomer, and fatty acid, another type of monomer. Fat acts as an insulator, a cushion, and a permanent energy source for living things. Fats are also the building blocks of cell membranes and are used to store vitamins, filter toxins, and synthesize hormones.
Types of lipids include triglyceride, phospholipid, and sterol. In this article, we’ll look at the structure of these three lipids, how they work in the body, and where they are found in food.
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We're surrounded by living creatures that we can't see. What are some ways that tiny living things can affect your life, health or environment? Bacteria are tiny
Answers
Answer:
Microorganisms that are not visible are so called because their measurements are in micrometers and even nanometers.
We usually talk about viruses, bacteria, fungi and even parasites.
Explanation:
Microorganisms are mostly pathogens for humans, but others make up the commensal biota of the same living being.
Not all microorganisms need the same means to live and develop as large organisms such as those that are simple to the human eye.
Some microorganisms are seen by optical microooscopy and others smaller by electronically.
A reflex in which a contralateral extensor muscle is contracted is called a?
Answers
The reflex you are referring to is known as the crossed extensor reflex. It is a protective mechanism exhibited by the body in response to a potentially harmful stimulus.
When this reflex is triggered, the flexor muscles on one side of the body contract, withdrawing the limb from the stimulus. Simultaneously, the extensor muscles on the opposite side of the body contract, providing support and stability to maintain balance. This reflex allows for the body to respond swiftly and effectively to external threats, ensuring the preservation of equilibrium and preventing potential injuries. The crossed extensor reflex is an important component of the complex network of reflex actions in the human body.
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Which of the following proteins could be used to carry proteins across the
cell membrane?
Answers
Answer:
The answer is B :)
Explanation:
Proteins pass through the membrane through passive transport. So the protein used to carry protein through integrated channel membrane. so the correct option is C.
What are proteins?A protein is a naturally occurring complex substance which consists of amino acid residues joined by peptide bonds.
Passive transport is defined as movement of a solute from a region of high electrochemical potential to a region of lower electrochemical potential on the opposite side in cell membrane. The figure representing the protein transportation through protein carrier channel.
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tissue culture method of an artificial vegetative propagation in plants play a great role in Forestry Horti culture and agriculture field clarify this statement in three point
Answers
here are three points that clarify the statement that tissue culture method of artificial vegetative propagation plays a great role in forestry, horticulture, and agriculture:
Mass Production of Clones: Tissue culture allows for the production of large numbers of identical clones of plants. This is particularly useful in forestry, where certain desirable traits such as disease resistance or fast growth can be propagated on a large scale. Similarly, in horticulture and agriculture, tissue culture is used to mass-produce desirable varieties of plants, such as fruit trees or ornamental plants, which can then be sold to consumers.
Disease-Free Plants: Tissue culture is a sterile process that allows for the production of disease-free plants. This is particularly important in agriculture and horticulture, where plant diseases can cause significant economic losses. Tissue culture allows for the production of healthy plants, which can then be used to establish disease-free plantations or gardens.
Genetic Modification: Tissue culture can also be used for genetic modification of plants. This is particularly important in agriculture, where genetically modified plants can be developed to be resistant to pests or to produce higher yields. Tissue culture allows for the precise manipulation of plant cells and genes, leading to the development of new plant varieties that have desirable traits.
a protein that acts as a hormone is
Answers
Answer:
Insulin
I don't know how to explain it, sorry.
what are the finger-like extensions in this part that actually absorbs the nutrients?
Answers
Answer:
Villi
Explanation:
Hope this helps have a good day :)
according to the article on sediba, what species did sediba probably evolve from?
Answers
According to the article on sediba, it is believed that sediba probably evolved from the Australopithecus africanus species.
Sediba most likely refers to the South African hominid species Australopithecus sediba. Although it is thought to share some anatomical traits with the species Homo, the specifics of its evolutionary history and antecedents are still being researched and debated by scientists.
The species, which was initially reported in 2010, is regarded as a crucial transitional species in the evolution of humans. There is disagreement over Australopithecus sediba's position in the hominid evolutionary tree as a result of its combination of primitive and more developed traits.
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A scientist wants to learn how to artificially synthesize a protein that is produced in a horse’s liver. Explain in three to four sentences the steps the scientist would take to determine the DNA that codes for this protein
Answers
To determine the DNA that codes for the protein produced in a horse's liver, the scientist would typically follow a series of steps, including DNA extraction, gene identification, gene cloning, and sequencing.
First, the scientist would extract DNA from the horse's liver cells. This involves breaking open the cells to release the DNA and purifying it for further analysis. Next, the scientist would identify the specific gene that codes for the protein of interest. This can be done using various molecular biology techniques such as polymerase chain reaction (PCR) or DNA hybridization.
Once the gene is identified, the scientist would clone it by inserting it into a suitable DNA vector, such as a plasmid. This allows for the replication and amplification of the gene of interest. Finally, the cloned DNA would be sequenced to determine the precise nucleotide sequence that codes for the protein. DNA sequencing techniques, such as Sanger sequencing or next-generation sequencing, can be employed for this purpose.
By following these steps, the scientist can successfully determine the DNA sequence that codes for the protein produced in a horse's liver, laying the foundation for further studies and potentially enabling the artificial synthesis of the protein in a laboratory setting.
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Which type of chromosomal disorders seems to have the greatest affect on a person’s health—disorders involving autosomes or sex chromosomes? Why do you think this might be the case? thanks in advance
Answers
Answer:
Disorders involving sex chromosomes.
we can take Turner's syndrome n klinefelter's syndrome as examples.
What is the term given to sand, clay, and decaying organic matter?
Answers
Temperate conditions: Temperate conditions: Tend to be good for preservation of most materials because they are mild climates. Tend to destroy delicate materials because of fluctuating rain and relatively warm temperatures. Tend to be bad for preservation because of high atmospheric levels of oxygen. Tend to preserve organics well, but erode inorganic materials quickly.
Answers
Because of the fluctuating rainfall and generally warm temperatures, fragile goods have a tendency to be destroyed.
Fluctuating:
When something dies, living things: Stop consuming carbon-14, which enters the food chain through carbon dioxide. Which of the following animal remains is most frequently used by archaeologists to ascertain environmental conditions? Microscopic animals like amber at, insects, rodents, and even microscopic organisms!To uncertainly back and forth-shift Oil prices were fluctuating. The temperatures changed. 2: to fluctuate in waves or as if in waves On the choppy water, the boat shook. a transitive verb that means to produce a change.During the growing season of the crops, the farmers also experienced fluctuating rain, which is defined as unpredictable and out-of-season rain. This was particularly true during flowering, when the rain could damage and shed pulse flowers and prevent pollination, which would negatively impact fruit setting and reduce yields.Learn more about fluctuating here brainly.com/question/28133503
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Which of these happens when a person drinks nearly-pure water?
extracellular fluids become hypertonic
extracellular fluids become hypotonic
blood plasma becomes more concentrated
water moves from the cells into the extracellular fluid
Answers
When a person drinks nearly pure water, the extracellular fluids become hypotonic.
In the human body, extracellular fluid is a liquid found outside of the cells. Blood plasma and interstitial fluids are two examples of extracellular fluids. The extracellular fluid serves as a medium for exchanging nutrients, oxygen, and waste products among the cells in the body. Extracellular fluids become hypotonic when a person drinks almost-pure water.
A hypotonic solution is one in which there are fewer solutes outside the cell than inside. As a result of osmosis, water will flow from a region with fewer solutes (hypotonic solution) to a region with more solutes (hypertonic solution). Fluid balance in the human body is maintained through the action of osmosis. The flow of fluids between the intracellular and extracellular compartments is critical to maintaining this balance. When a person drinks nearly pure water, the extracellular fluids become hypotonic. As a result, water moves from cells to extracellular fluids.
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the energy in food is chemical energy, which can be converted into mechanical, electrical, thermal, or other forms of energy in the body. question 26 options: true false
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The given statement is true.
The energy stored in food is chemical energy, which can be converted into various forms of energy within the body. When we consume food, the body breaks down the chemical bonds in the nutrients through processes like digestion and metabolism. This releases energy that can be used for mechanical work (such as muscle contractions), electrical signals (in the nervous system), thermal energy (body heat), and other physiological functions. The conversion of chemical energy from food to other forms of energy allows our bodies to perform various activities and maintain essential bodily functions.
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Students are provided with a choice of two solutions. Each one is used to test for
the presence of a different chemical.
99
Solution
Tests for the presence of
Fehling's solution
Sugar
Lime water
Carbon dioxide
How could the students use one of these solutions to gather evidence for the
action of photosynthesis?
Pump the air from a closed container containing a plant through a sample of lime water.
O Grind up all parts of a plant, expose them to heat, collect the gas, and use lime water to test it
o Use Fehling's solution with the roots of several different species of plants, after boiling them for several minutes.
Use Fehling's solution on plant leaves exposed to light and on plant leaves covered in aluminum foil for a week.
Answers
Transcribed image text: 62. The parathyroid gland is able to sense when blood calcium levels are low and secrete PTH to act on various target tissues to increase calcium levels. This homeostatic control system is important because calcium is necessary for many physiological processes. Which of the following would NOT be impaired by low blood calcium levels? (In other words, which of the following processes do NOT require calcium?) a. Repolarization of a neuron's plasma membrane during action potentials b. Exocytosis of neurotransmitters from axon terminals c. Smooth muscle contraction d. Gland secretions e. Exocytosis of neurotransmitters from varicosities in the ANS 63. What structures are specialized to detect a specific form of energy in the external or internal environment and transduce it into a graded potential? a. Nociceptors b. Photoreceptors c. Rods d. Primary cortex e. Sensory receptors 64. What best describes the concept of dual innervation? a. Most viscera are regulated by both the endocrine system and autonomic nervous system Most viscera only receive innervation by one of the two divisions of the autonomic nervous system Most viscera are innervated by both the somatic motor division and the autonomic nervous system d. Most viscera are innervated by both the parasympathetic division and sympathetic division of the autonomic nervous system e. None of the other answers are correct b. C. 65. The resting membrane potential is established mainly from the diffusion of: a. Potassium ions through voltage-gated channels b. Sodium ions through voltage-gated channels c. Sodium ions through leak channels d. Potassium ions through leak channels e. Calcium ions through leak channels 66. The rapid depolarization phase of an action potential is due to the movement of: a. Chloride ions through voltage-gated channels b. Sodium ions through voltage-gated channels c. Potassium ions through voltage-gated channels d. Potassium ions through leak channels e. Sodium ions through leak channels 67. Neurotransmitters (NT) bind to receptors on postsynaptic neurons and cause ion channels to open or close. How does this affect the postsynaptic neuron? a. NT binding changes the membrane potential and create either a depolarizing or hyperpolarizing graded potential b. NT binding will always trigger an action potential C. NT binding will always make the membrane potential more positive and create a depolarizing graded potential d. NT binding will always make the membrane potential more negative and create a hyperpolarizing graded potential e. NT binding activates second messengers only and does not affect membrane potential
Answers
62. The process that does NOT require calcium is repolarization of a neuron's plasma membrane during action potentials.
a. Repolarization is the stage of an action potential in which the membrane potential returns to its resting state by either potassium ions flowing out or chloride ions flowing in. The reason for this is that it does not need calcium because the movement of potassium ions is regulated by potassium channels.
b. Exocytosis of neurotransmitters from axon terminals requires calcium ions to enter the axon terminal from the extracellular fluid, leading to fusion of vesicles with the presynaptic membrane and the release of neurotransmitters.
c. Smooth muscle contraction requires calcium ions to bind with calmodulin, which then activates myosin light-chain kinase, resulting in the phosphorylation of myosin.
d. Gland secretions are stimulated by various factors, including calcium ions that play a role in the release of certain hormones.
e. Exocytosis of neurotransmitters from varicosities in the ANS requires calcium ions to enter the varicosity, leading to the fusion of vesicles with the plasma membrane.
63. Sensory receptors are specialized structures that detect a specific form of energy in the external or internal environment and transduce it into a graded potential. Photoreceptors are sensory receptors in the retina that detect light energy, whereas nociceptors are sensory receptors in the skin that detect pain. Rods are photoreceptor cells in the retina that detect light under low-light conditions. The primary cortex is the region of the brain that receives and processes sensory input from sensory receptors.
64. Dual innervation is the concept that most viscera are innervated by both the sympathetic and parasympathetic divisions of the autonomic nervous system. These two divisions have opposing effects on the same organ, allowing for fine control of the organ's activity. Some examples include the heart, which is innervated by both the sympathetic and parasympathetic divisions, and the gastrointestinal tract, which is innervated by both divisions as well.
a. Most viscera are regulated by both the endocrine system and autonomic nervous system,
b. Most viscera only receive innervation by one of the two divisions of the autonomic nervous system,
c. Most viscera are innervated by both the somatic motor division and the autonomic nervous system.
e. None of the other answers are correct are incorrect.
65. The resting membrane potential is established mainly from the diffusion of potassium ions through leak channels. The resting membrane potential is the voltage difference between the inside and outside of a cell when it is not being stimulated. This potential is established by the movement of ions through ion channels in the plasma membrane. Potassium ions are the most important ions involved in generating the resting membrane potential because the cell is more permeable to potassium than any other ion.
a. Sodium ions through voltage-gated channels,
b. Potassium ions through voltage-gated channels,
c. Sodium ions through leak channels,
d. Calcium ions through leak channels, and
e. Calcium ions through voltage-gated channels are incorrect because only a few ions can diffuse through leak channels, and voltage-gated channels are activated by changes in membrane potential, not by concentration gradients.
66. The rapid depolarization phase of an action potential is due to the movement of sodium ions through voltage-gated channels. The rapid depolarization phase of an action potential is characterized by a rapid increase in membrane potential due to the influx of positively charged ions into the cell. This influx of ions is mainly due to the opening of voltage-gated sodium channels in the plasma membrane. Chloride ions, potassium ions, and sodium ions through leak channels are not responsible for the rapid depolarization phase of an action potential.
67. Neurotransmitters (NT) bind to receptors on postsynaptic neurons and cause ion channels to open or close. This affects the postsynaptic neuron because NT binding changes the membrane potential and creates either a depolarizing or hyperpolarizing graded potential. The effect of NT on the postsynaptic neuron depends on the type of receptor it binds to. Some receptors are ligand-gated ion channels that directly open or close ion channels, while others are G protein-coupled receptors that activate intracellular signaling pathways.
About CalciumCalcium or lime is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark nitride-oxide layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologs strontium and barium.
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the double-folded serous membrane that surrounds the lungs is:
Answers
The double-folded serous membrane that surrounds the lungs is called the pleura.
A pleura is a serous membrane that folds back on itself to form a two-layered membranous pleural sac. The outer layer is called the parietal pleura and attaches to the chest wall. The inner layer is called the visceral pleura and covers the lungs, blood vessels, nerves, and bronchi.A thin layer of tissue that covers the lungs and lines the interior wall of the chest cavity. It protects and cushions the lungs. This tissue secretes a small amount of fluid that acts as a lubricant, allowing the lungs to move smoothly in the chest cavity while breathing.he outer layer is called the parietal pleura and attaches to the chest wall. The inner layer is called the visceral pleura and covers the lungs, blood vessels, nerves, and bronchi.
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Answer:
The pleura are double-layered serous membranes that surround each lung. Attached to the wall of the thoracic cavity, the parietal pleura forms the outer layer of the membrane. The visceral pleura forms the inner layer of the membrane covering the outside surface of the lungs.
What are the 4 parts of the DNA strand?
Answers
The four parts of the DNA strand are hydrogen bonds, nitrogenous bases, a phosphate group and a pentose sugar.
The double helical structure of DNA is composed of nucleotides held by phosphodiester linkages. Each nuceotide in DNA is composed of a pentose sugar called deoxyribose, four nitrogenous bases -adenine, cytosine, guanine, and thymine, and a phosphate group. The nitrogenous bases in DNA molecules are held by hydrogen bonds. The double strands of the DNA molecule are twisted around each other on a common axis to form a helix that closely resembles a ladder.
The pairing of bases is said to be complementary in nature. This means that adenine is paired with thymine by double hydrogen bonds, and guanine is paired with cytosine by triple hydrogen bonds. This complementary pairing of nitrogenous bases is in accordance with the Chargaff's rule.
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identify the small facial bones found in the medial wall of the orbit.
Answers
Answer:
Lacrimal
Explanation:
Marissa has had her entire thyroid gland removed because of a malignant tumor. She takes synthetic thyroid hormone to replace the thyroxine that her thyroid gland would have produced, but she is worried about her blood calcium. Does she need to worry about this problem
Answers
We have that for the Question "Does she need to worry about this problem" it can be said that
If Mary is taking Calcium medication with thyroid hormone,she does not need to worry about this problemFrom the question we are told
Marissa has had her entire thyroid gland removed because of a malignant tumor. She takes synthetic thyroid hormone to replace the thyroxine that her thyroid gland would have produced, but she is worried about her blood calcium. Does she need to worry about this problem
Hormone known as TSHGenerally normal thyroid feature is watched through the pituitary gland. The pituitary makes a hormone known as TSH that motives the thyroid gland to make thyroid hormone for the body.
the hormone additionally promotes increase of the thyroid gland and likely of thyroid most cancers cells.
Levothyroxine (L-T four )Levothyroxine (L-T four ) is one of the most typically given medications. It is given as both physiologic alternative remedy in sufferers with hypothyroidism or as interventional remedy to suppress thyroid-stimulating hormone secretion in sufferers with thyroid cancer.
Therefore
if Mary is taking Calcium medication with thyroid hormone,she does not need to worry about this problem
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only one of these cell types also has an extensive rough er and abundant golgi stac
Answers
Answer:
Secretory cells
Explanation:
The cell type that has an extensive rough endoplasmic reticulum (ER) and abundant Golgi stacks is secretory cells. The rough ER is responsible for protein synthesis and processing, and the Golgi stacks are responsible for processing and modifying proteins before they are secreted from the cell. Secretory cells, which include cells in glands and the pancreas, produce and secrete proteins, hormones, and other substances, so they require extensive rough ER and abundant Golgi stacks to carry out these functions.
The cell type that has an extensive rougher and more abundant Golgi stack is a protein-secreting cell.
The Golgi stack is a collection of tiny sacs found in eukaryotic cells. The Golgi stack, also known as the Golgi apparatus, is an important organelle involved in the processing and sorting of proteins and lipids that have been produced in the endoplasmic reticulum, as well as their transport to their final destinations. Generally, the Golgi stack is formed by a group of flattened, disk-like membrane-bound sacs. These sacs are stacked on top of one another in a curved, semi-circular shape. The membrane-bound sacs contain enzymes that modify and sort proteins and lipids according to their final destination within the cell. These modifications include adding or removing carbohydrate chains to or from glycoproteins and glycolipids. Different cell types contain different amounts of Golgi stack, as well as different types of Golgi enzymes, based on their specific roles in protein and lipid processing and transport. Protein-secreting cells, for example, have more extensive and rougher Golgi stacks, while other cell types may have smaller, less complex Golgi stacks.
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true or false the suprachiasmatic nucleus of the thalamus requires input from the retina to maintain circadian rhythms
Answers
True. Circadian rhythms must be maintained by the retinal input to the suprachiasmatic nucleus of the thalamus.
Direct inputs from photosensitive ganglion cells in the retina are sent to the RHT. The RHT regulates the photic modulation of circadian rhythmicity by secreting glutamate into the core VIP areas of the suprachiasmatic nucleus. The retinohypothalamic tract connects the SCN to the retina's specialized photosensitive ganglion cells.
Light-induced gene expression is a property of ventrolateral SCN (vlSCN) neurons. the suprachiasmatic nucleus's verifiable claims. Both the circadian rhythm and the brain's internal clock are produced by the suprachiasmatic nucleus. One is able to control how often they sleep and wake up each day thanks to this method.
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1. Which of the following would not be considered part of a niche?
O where the organism lives
O the prey of the organism
when an organism dies
O how far an organism travels to eat
Answers
Answer:
How far the orginisme travels to eat.
Explanation:
PLS HELP ME I NEED THIS IN 1 MINUTE I AM BEING TIMED AND I'M SO CONFUISED PLEASE!!!
When does a solar eclipse occur?
when the moon's umbra covers the sun
when the earth's umbra covers the sun
when the moon's umbra falls on the earth
when the earth passes between the moon and the sun
Answers
Answer:
Explanation:
what is the rate of mutation at the locus associated with leucine biosynthesis? express your answer using two significant figures.
Answers
The rate of mutation at the locus associated with leucine biosynthesis cannot be determined without specific information.
The rate of mutation at the locus associated with leucine biosynthesis is a variable value and can depend on several factors. Mutation rates can be influenced by various factors such as the specific organism, environmental conditions, and genetic background. The rate of mutation is typically expressed as the number of mutations that occur at a specific locus per generation. However, without specific information regarding the organism and its specific genetic and environmental context, it is not possible to provide an accurate rate of mutation at the locus associated with leucine biosynthesis.
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Leucine biosynthesis is a complex process that involves a series of enzymatic reactions. In E. coli, the gene ilvBN encodes two of these enzymes, acetohydroxy acid synthase I and II.
A mutation at the ilvBN locus can prevent the synthesis of these enzymes, leading to a requirement for leucine in the growth medium. The rate of mutation at the ilvBN locus has been measured in several studies and is estimated to be around 10^-9 per generation. This means that, on average, one mutation will occur at this locus every billion cell divisions.
This rate is similar to the overall mutation rate in E. coli and many other bacterial species. However, the rate of mutation can vary depending on factors such as the specific sequence of the ilvBN gene and the presence of mutagens in the environment.
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The mRNA molecule contains the codon
that is read during translation. What
molecule contains the anticodon that is
complementary to this codon?
A. nucleosomes
B. amino acids
C. TRNA
Answers
Answer:
it is TRNA
Explanation:
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Which of the following answer choices would be considered the
simplest?
Answers
Answer:
the smallest one
Explanation:
Review the water cycle diagram below. What effect would removing the precipitation stage have on this environment?
A. There would be little snow and ice accumulation on the mountains.
B. There would be more evapotranspiration in the atmosphere.
C. There would be less water in the nearby oceans or bodies of water.
D. There would be increased surface runoff and groundwater discharge.
Answers
Answer:
the answer is letter D. hope this helps ^v^
why amylose doesn't form a gel when hot water is added? can someone explain