What statement is correct about the polarity of a water molecule?

Answer:

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across

Explanation:

Answer:

Atom:An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.

Explanation:

Hope this helped

Answer:

plant cells have a rigid cell wall that helps it keep shape and animal cells don't

Answer:

Plant cells contain a cell wall to help give better structure and protection than animal cells. Plant cells also contain a large central vacuole that is used to store waste and water. Another thing is that plant cells have an organelle that preforms photosynthesis.

Answer:

Calcium

Explanation:

Calcium is the healthy bone mineral. About 99% of the calcium in the body is stored in the bones and teeth. It's the mineral that makes them hard and strong. The remaining 1% is needed for many activities that help keep the body functioning normally.

Answer:

Phosphorus will strengthen her bones.

Explanation:

There are a wide number of dietary minerals that are involved in the strengthening of bones. But among all of them, calcium and phosphorus are the key minerals that play an active role in providing strength to the bones. Phosphorus keeps the bones healthy and strong. It also helps in the growth of bones.

Low amounts of phosphorus can lead to thinning of the bones, a disease termed as osteoporosis.

Exhalation is known for the flow of the respiratory current out of the organism.

In general ,During inhalation, the ribs move up and outward and the diaphragm moves in. This causes the decrease in space of our chest cavity and the air rushes in.

On the other hand exhalation, occurs when the ribs moves down and inward and the diaphragm moves up. This movement increases the space in our chest cavity and the air is pushed out. Hence, exhalation occurs when intercostal muscles and diaphragm relax, and air is forced out of the lungs and air passages to remove carbon dioxide from the body.

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Small-sized white herons are called snowy egrets which belongs to chordates. Snowy Egrets are short-legged and have black coloured bills.

The observation that can be inferred from the chart is:

Option B. The egrets prefer crawfish over fish.

This nature of Egrets can be explained as:

Therefore, egrets prefer crawfish.

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Answer:

B. Lights

Explanation:

One way to see this is that every other source is natural, while this is mainly caused manly.

Answer:

Aristotle observed that only 50% of the stars are visible at one time, concurring that Earth is round because if not we would all see the same stars 100% of the time.

One advantage of having a cloned flock of sheep is that there would be no characteristic difference, while a disadvantage includes that there would be no desirable variations.

Advantages of having a cloned flock includes that there would be no difference. Unlike non-cloned herds, which have a high genetic diversity, all would be identical genetic copies. All sheep would be identical. All sheep would have one or more desired characteristics (that the original individual possessed).

Disadvanatges include because they are all the same, a disease to which they have no resistance could wipe out the entire flock. The sheep could have a genetic defect, shorter life expectancy. They would all be the same sex and thus could not mate. One reason why the offspring of breeding these sheep with an unrelated sheep would not all be the same include that both parents pass on genes to their children. Hence, various gene combinations will result.

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A cloned flock would be different from a noncloned flock in that all the sheep in the cloned flock would be genetically identical. This is due to the fact that cloning involves taking the genetic material from a single individual and creating copies of it.

One advantage of having a cloned flock would be that the farmer would be able to predict with greater accuracy the characteristics of the flock, such as wool production and feed efficiency.

One disadvantage of having a cloned flock is that the flock could be more vulnerable to disease, since all the sheep would have the same genetic makeup and be susceptible to the same diseases.

One reason that the farmer could not mate these cloned sheep with each other to increase the size of his flock is that the offspring created would be genetic clones, or "carbon copies," of the parent sheep. This is due to the fact that cloning creates an exact genetic duplicate of the parent sheep.

One reason that the offspring resulting from breeding these sheep with an unrelated sheep would not all be the same is that, while the parent sheep are genetically identical, the unrelated sheep would have different genes, resulting in a more diverse gene pool and greater variability in the offspring.

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The number of calories on a Halloween stash depends on the type of candies and the number of units of each. If the stash contains 5 units of each of these candies: chocolate bars, taffies, lollypops, and candy corn the total number of calories is 1,650.

Calories are the most common unit used to define the energy a specific food gives to your body. For example, an apple has 52 calories, while a banana has 89 calories.

Considering this, in a Halloween stash the calories depend on two factors:

Let's suppose there are 5 units of each of the following candies:

Let's now calculate the calories

Add all the previous results:

1,100 + 100 + 415 + 35 = 1,650 calories in total

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Lymph, tissue fluid, and plasma are all fluids that exist in the body, but they differ in their location and composition.

Lymph is a clear fluid that circulates through the lymphatic system. It is formed when tissue fluid enters the lymphatic vessels and is transported through the lymphatic vessels and lymph nodes. Lymph contains immune cells and waste products and is important for the immune system.

Tissue fluid is a fluid that surrounds the cells in tissues. It is formed when blood plasma filters out of the capillaries and into the spaces between cells. Tissue fluid supplies nutrients and oxygen to the cells and removes waste products.

Plasma is the liquid part of the blood. It contains water, electrolytes, proteins, hormones, and waste products. Plasma carries nutrients, hormones, and waste products to and from the cells and tissues in the body.

In summary, lymph is a fluid that circulates through the lymphatic system, tissue fluid is a fluid that surrounds the cells in tissues, and plasma is the liquid part of the blood that carries nutrients, hormones, and waste products to and from the cells and tissues in the body.

A collection of cloned DNA fragments representing the organism's entire genome is called a genomic library.

A genomic library is a collection of cloned DNA fragments that together represent the entirety of an organism's genome, which can be used for various genetic studies, such as gene mapping, sequencing, and expression analysis.

The genomic library is created by isolating and breaking down the DNA from the organism's genome into smaller fragments using restriction enzymes, which are enzymes that cleave DNA at specific nucleotide sequences.

The fragments are then ligated into a vector, which is a DNA molecule that is used to carry the DNA fragments into host cells, and the vector is introduced into a bacterial or yeast host cell for cloning. The resulting library contains thousands to millions of bacterial colonies, each containing a cloned fragment of the genome.

The genomic library can be screened using various techniques to identify specific genes or DNA sequences of interest. For example, a probe can be designed that is complementary to a particular gene or DNA sequence, and the library can be screened using this probe to identify clones that contain the target sequence.

Overall, the genomic library is an essential tool in genetic research, allowing researchers to study the structure and function of genes and genomes in various organisms. It can provide insights into disease-causing mutations, genetic diversity, and evolutionary relationships between species.

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Answer:

it will expand as water moves hope this helps!

Explanation:

Answer:

Producing new plants by cloning is quicker than allowing plants to reproduce then collecting and sowing seeds. It's therefore an effective way of producing new individuals from rare and endangered plants, helping to preserve the species.

Clones will also be genetically identical to the original plant providing the meristem cells.

Plants are cloned to produce identical plants quickly and economically.

Answer: Varies

Explanation:

Evidently, it takes everything out of proportion, biologically.

Explanation:

thanks for the points man :) yes sir

Answer:

Ecology is the study of organisms and how they interact with the environment around them. 

Explanation:

yep u r correct

The statement 'the study of the relationship between living things and their environment is called ecology' about ecology is TRUE.

Ecology refers to the interaction between different abiotic factors (non-living part) and biotic factors (living part) in an ecosystem.

In conclusion, the statement 'the study of the relationship between living things and their environment is called ecology' about ecology is TRUE.

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Answer:

Vertebrates

Explanation:

False. During DNA replication, mistakes can occur, leading to mutations and genetic variation. However, the cell has mechanisms in place to correct some of these mistakes and maintain the integrity of the DNA sequence.

DNA replication is the process by which a cell duplicates its DNA before cell division. This process ensures that each daughter cell will receive an exact copy of the genetic material from the parent cell. The process of DNA replication involves several steps. First, the DNA double helix must be unwound by an enzyme called helicase. This creates a replication fork, which is the site where the DNA strands are separated and replication occurs. Next, an enzyme called primase synthesizes a short RNA primer on each strand of the DNA at the replication fork. This primer provides a starting point for DNA polymerase to begin the synthesis of a new strand of DNA. DNA polymerase is the enzyme responsible for adding new nucleotides to the growing DNA strand. It can only add nucleotides in the 5' to 3' direction, so the new strand is synthesized in the 5' to 3' direction in a continuous fashion on the leading strand.

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Answer:

d. none of the above

Explanation: hope it helps ^w^

None of the above because all three mentioned human activities require water. Therefore, option D is correct.

Water is essential for healthy ecosystems, socioeconomic development, food and energy production, and human existence, which is at the heart of sustainable development.

As the vital link between society and the environment, water is also at the core of adaptation to climate change.

By serving as a solvent, water is an essential component of the majority of biological activities. Food is absorbed into our bodies as solutions using water as the solvent. Additionally, a lot of waste materials are eliminated as solutions through sweat and urine. Our body temperature is regulated by water. Therefore, option D is correct.

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we can accurately visualize or model the solar system, we are better able to understand how it works, make predictions about the impacts of various changes in the solar system.

The solar system is a large with approximate size at least 100 astronomical units in size held together by the sun’s immense gravitational pull that keeps  the planets and the asteroids in orbit

The solar system have 8 planets  which  revolve around the sun in an elliptical paths known as orbits where The earth is also one of the planets and lies at a distance from the sun.

These planets were formed at least 4.6 billion years ago where discs of dust and gas orbiting around the sun followed by collapse and clumping together due to gravity.

There are two types of planets are observed such as Rocky planets include Mercury, Venus, Earth, and Mars as these are made up of solid rock and metal; Gas giants include Jupiter, Saturn, Uranus, and Neptune

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Explanation:

TAGCCG

For such problems you need to get the other base that would pair with the given one.

But note : you need to be careful not to confuse with the complimentary base pairs of RNA.

Answer:

Explanation:

The 'greenhouse effect' is the warming of climate that results when the atmosphere traps heat radiating from Earth toward space. Certain gases in the atmosphere resemble glass in a greenhouse, allowing sunlight to pass into the 'greenhouse,' but blocking Earth's heat from escaping into space.

Answer: Analytical

Explanation: to solve things

Answer:

Objective: The purpose of this lab is to find out the effect increasing and decreasing limiting factors has on the Floridian Cricket frogs in the Everglades as well as obtain new knowledge on their habits and lifestyle.

Hypothesis: If the predators are increased, then the Cricket frog population will decrease over the span of five years.

If the pollution is increased then the population of the Cricket frog will decrease in the span of five years.

If the amount of food is increased then the population of the Cricket frog will increase over the span of five years.

Procedure: The independent variable is      Their effect                  . The dependant variable is the increase/decrease of the Cricket frog population

Explanation: These are the affect of the increase/decrease of the frog population.

Answer: what they said

Explanation:

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.

Calcium 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 knee joint is the largest joint in the human body and is a  joint that connects the femur, tibia, and patella bones. It is a synovial joint, which means that it is lubricated with synovial fluid to reduce friction and allow smooth movement.

Bones: The femur, tibia, and patella are the three bones that make up the knee joint. The femur (thigh bone) articulates with the tibia (shin bone) at the knee joint, while the patella (kneecap) sits in a groove on the front of the femur and articulates with it as well.

Cartilage: There are two types of cartilage in the knee joint. The first is articular cartilage, which covers the ends of the bones where they meet at the joint. Articular cartilage provides a smooth surface for the bones to glide over during movement. The second is meniscal cartilage, which is a C-shaped piece of cartilage that sits between the femur and tibia bones. Meniscal cartilage acts as a shock absorber and helps to distribute the load across the joint.

Ligaments: Ligaments are strong bands of connective tissue that hold the bones of the knee joint together and provide stability. There are four main ligaments in the knee joint: the anterior cruciate ligament (ACL), the posterior cruciate ligament (PCL), the medial collateral ligament (MCL), and the lateral collateral ligament (LCL).

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In biology and environmental science, the sporting potential of an organic species in a specific habitat refers back to the most quantity of individuals (of that species) that the surroundings can bring and sustain, thinking about its geography or bodily features.

Carrying potential will also be described because the populace length at which the populace increase price equals zero

Populations develop at a price constrained via way of means of the supply of the Earth’s sources. A populace can also additionally develop at a quicker price and observe a J-formed curve.

When the start price surpasses the dying price of the species, this effects in an exponential increase. However, this fashion quickly adjusts as sources end up constrained. The increase in price slows down.

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