According to current evolutionary theory, which of the following is true?
a. individuals evolve in response to natural selection. b. evolution is independent of genetics. c. populations are the units of evolution. d. when studying evolution, biologists typically look at the frequency of alleles possessed by an individual.
Answers
According to current evolutionary theory, populations are the units of evolution. The correct answer is c.
Evolution is defined as the change in the inherited characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction.
Individuals do not evolve, but populations do. A population is a group of individuals of the same species that live in the same area and interbreed.
Over time, the genetic makeup of a population can change due to natural selection, genetic drift, mutation, and gene flow.
Natural selection is the process by which organisms that are better adapted to their environment are more likely to survive and reproduce. This leads to a change in the frequency of alleles in the population, which is the definition of evolution.
Genetic drift is the random change in the frequency of alleles in a population. This can happen due to chance events, such as a natural disaster that kills a large number of individuals.
Mutation is a change in the DNA of an organism. This can lead to new alleles being created, which can then be passed on to offspring.
Gene flow is the movement of alleles from one population to another. This can happen due to migration or interbreeding.
When studying evolution, biologists typically look at the frequency of alleles in a population. This is because the frequency of alleles is a measure of the genetic variation in a population, and genetic variation is the raw material for evolution.
Therefore, the correct answer is c. populations are the units of evolution.
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Related Questions
The human body temperature is normally 98.6°F. As a person exercises, the body temperature starts to increase. As a result of the increased body temperature, the perspiration process
begins to cool the body. Which best describes what the body is doing when it perspires?
A. increasing osmosis
B. reducing transpiration
C. controlling metabolism
D. maintaining homeostasis
Answers
Answer:
.A. increasing osmosis
Question 8 of 10
Put these processes of the water cycle in the correct order starting from the
moment the sun transfers its energy.
1. The sun shines. Water evaporates into the atmosphere.
Water vapor condenses into liquid water and forms clouds.
* Rain, snow, or other precipitation falls.
11 Water collects in rivers, lakes, and other bodies of water.
Answers
The sun shines. Water evaporates into the atmosphere. Water vapor condenses into liquid water and forms clouds. Rain, snow, or other precipitation falls. Water collects in rivers, lakes, and other bodies of water.
What is water cycle?
The continual circulation of water on, above, and below the Earth's surface is referred to as the "water cycle," sometimes known as the "hydrologic cycle" or the "hydrological cycle."
The water cycle significantly affects the climate. For instance, a rise in temperature is a result of the greenhouse effect. The earth's temperature would rise sharply without the water cycle's evaporative cooling action. Other biogeochemical cycles also depend on the water cycle in one way or another. All organisms are affected by this cycle.
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C
The animals that live in the polar region have the following adaptation(s):
a.) all of the answers listed
b.) thick fur
c.) breed less often
d.) slow maturation
Answers
Answer:
the answer should be A
Explanation:
Read the section "How many genes play a role in athletic talent?"
What does this section explain that other sections do not?
the total number of genes every human has
the information scientists still do not know
(A)
(B)
(C)
(D)
the different groups of people studying genetic testing
the names of the genes that affect athletic ability
Answers
The infomation about genes are below.
What is genes?Genes are the basic physical and functional units of heredity. They are passed from parent to offspring and contain the information needed to specify traits. Each gene is made up of a sequence of DNA or RNA and is located in a specific position on a chromosome. Genes act as instructions to make molecules called proteins, which are the building blocks of cells and control the structures and functions of the human body. A single change in a gene can have a large effect on the structure or function of an organism, leading to a genetic disorde.
A. The total number of genes every human has
B. The information scientists still do not know
C. The different groups of people studying genetic testing
D. The names of the genes that affect athletic ability
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Which statement is part of the cell theory?
O The flow of energy occurs within cells.
O
Every cell in an organism is identical.
O New cells arise from chemicals in the environment.
O Multiple cells are required to form life.
Answers
Statement B. Every cell in an organism is identical. is part of the cell theory.
Cell theory is a scientific concept first formulated in the mid-nineteenth century, that residing organism is made of cells, that they're the simple structural/organizational unit of all organisms, and that each cell comes from pre-present cells.
The cell theory states that all biological organisms are composed of cells; cells are the unit of life and all lifestyles come from preexisting existence. The cell theory is so installed nowadays that it bureaucracy one of the unifying ideas of biology. The mobile concept is important because it explains the idea of the cell and includes the subsequent postulates: The cellular is the fundamental unit of existence. All cells arise from pre-existing cells i.e Omnis cellula e cellula. All residing organisms on the earth are made from cells.
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HELP HELP HELP I REALLY NEED THIS
Answers
Answer:
d
Explanation:
i think since more step
What does pineapple and cranberry juice do for the female body.
Answers
What does Pie apple and cranberry juice do for The remake Bosh
Answer
The answer is in The picture
Give me a brainliest as a thanks, Welcome
Which term refers to the accumulation of blood in the limbs that occurs when venous pressure is not high enough to overcome the weight of the blood and drive it upward
Answers
From what we know, the term used to describe the accumulation of blood in the limbs that occurs when venous pressure is not high enough to overcome the weight of the blood and drive it upward is venous pooling.
What is venous pooling?This is, as described in the question, the accumulation of blood in the limbs. This is often caused by the inability of the veins to keep blood moving towards the heart and is often an indicator of underlying pathology.
Therefore, we can confirm that the accumulation of blood in the limbs occurs when the veins are unable to maintain the blood flowing in the proper direction, and this is referred to as venous pooling.
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Which energy transfer most likely occurs between organisms in the food web?
a. from rabbit to fox
b. from sparrow to grass
c. from mouse to grasshopper
d. from owl to fox
from owl to fox
Answers
From sparrow to grass energy transfer most likely occurs between organisms in the food web. Thus the correct option is B.
What is food web?In food webs and food chains, there are different trophic levels, this includes producers such as plants, primary consumers such as herbivores, tertiary consumers such as carnivores, among others.
These levels are closely related in terms of energy as most organisms obtain energy by consuming others at a lower trophic level. For example, herbivores such as rabbits obtain energy by consuming plants (producers).
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Think about the many recent advances in science you’ve learned about, particularly those that have occurred in the last 25 years or so. Explain how the scientific research that led to these discoveries has characterized medical care in the 21st century and, in turn, how this has changed society and the environment.
Answers
Basic research led to the discovery of biological phenomena that enable the development of new technologies in medicine such as the CRISPR Cas9 genome editing system.
What is the CRISPR Cas9 genome editing system?The CRISPR Cas9 genome editing system is a tool used in genetic engineering that holds promise in medicine. This tool (CRISPR Cas9 genome editing system) can be used to edit genes in diseases and thus correct genetic mutation in the target organs and or tissue.
The CRISPR Cas9 genome editing system is based on the discovery of the defense system of bacteria which is a key point in basic research (bacteria include in their genome fragments of viral genomes to fight against them).
Therefore, with this data, we can see that the CRISPR Cas9 genome editing system and other technologies are based on discoveries in basic research.
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What is the likely advantage of growing a genetically modified variety of tomato that remains fresh over several days?
Post-harvest losses due to delayed transportation would be reduced.
Disease-causing pests may never be able to attack such a variety of tomato.
When consumed it would provide more nutrients than the regular variety.
When consumed it would improve the quality of life of people with genetic disorders.
Answers
Tomatoes are a perishable crop that are susceptible to spoilage and decay during transportation and storage. By developing a genetically modified variety of tomato that remains fresh for longer periods of time, farmers and distributors would be able to extend the shelf life of the tomato and reduce the amount of waste due to spoilage. This would also allow for longer transportation times and greater distances to be covered, leading to more efficient distribution and potentially lower costs for consumers.
The other options listed are not likely advantages of growing a genetically modified variety of tomato that remains fresh over several days. Disease-causing pests may still be able to attack the variety, and the nutritional content of the tomato would not necessarily be altered. Similarly, the variety would not be expected to improve the quality of life of people with genetic disorders.
May I please get help with question one. I also need to provide an example and understandable response in my explanation. The specialized cells in this lab are… abseission layer, sperm, corn root, cerebral cortex, vein/valve, kidney, bone marrow, muscle, sweat gland,
Answers
Multicellular organisms are made up of more thaan one cell, with groups of cells differentiating to take on specialilzes functions. Unicellular organisms are made up of only one cell that perform all of the functions needed by the organism.
Multicellular organisms gave set if cells that specialize in reproduction which is usually sexual. During fertilization, when an egg and spoerm fuse, the resultant zygote is considered to be unicellular.
There is no excretory organs in a unicellular organisms. They remove their waste by simple diffusion from the body surface to the surrounding water. In multicellular organisms, excretion occurs by specialised organs called kidney.
The thin segment of the nephron loop's descending limb ________. The thin segment of the nephron loop's descending limb ________. is easily broken and replaced often aids in the passive movement of water out of the tubule aids in the passive excretion of nitrogenous waste helps to pack a greater number of nephron loops into a smaller space
Answers
Answer:
The correct answer is ''aids in the passive movement of water out of the tubule''
Explanation:
The nephron loop has a descending branch, which goes to the renal medulla, and an ascending branch, which goes back to the cortex. The nephrons of these kidneys can have loops of Henle of different dimensions. The thin segment of the loop has thin epithelial membranes, its cells are highly permeable to water, but not to solutes. The water that exits from the descending portion of the nephron loop into the medullary space is immediately reabsorbed by the peritubular capillaries, causing osmolality to increase in both the tubular fluid and the medullary interstitial fluid. The characteristics of the descending branch differ from one species to another, the normal thing is that in one way or another, the osmotic concentration of the urine that moves through it is balanced with that of the interstitial fluid.
Explain the difference between the Needham experiment and the Spallanzani experiment in terms of
their methods, results, and conclusions.
Answers
The Needham experiment was replicated in the Spallanzani experiment, albeit with a few significant modifications.
In an experiment, John Needham in England filled a bottle with broth, cooked it to kill any organisms within, and then sealed it. Days later, he revealed that there was life in the broth and said that it had been generated spontaneously, concluding that this DOES happen. In actuality, his experiment was defective and caused the flasks to become contaminated.By extending the boiling time and securing the flasks from air and germs, Spallanzani altered Needham's experiment. As a result of his failure to spot any growths inside the flasks, he came to the conclusion that spontaneous generation was not feasible.By adding broth to two different bottles, heating the broth in both bottles, and then closing one bottle while leaving the other open, Spallanzani conducted his own experiment. The unsealed bottle was swarming with tiny living things a few days later, which he could see more clearly with the recently created microscope. No evidence of life could be seen in the sealed bottle. This effectively eliminated the possibility of spontaneous generation. Because oxygen was believed to be required for spontaneous generation, experts of the day noticed that Spallanzani had deprived the sealed bottle of air. Because of this, even if his experiment was successful, his arguments were refuted effectively.Learn more about the Needham experiment with the help of the given link:
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Which sentence best describes a monarch butterfly as a living system that is one part of a more complex system
Answers
A monarch butterfly can be described as a living system that is one part of a more complex system. As a living system, the monarch butterfly possesses various characteristics and functions that allow it to survive, reproduce, and interact with its environment.
Firstly, the monarch butterfly undergoes a complex life cycle, which includes four distinct stages: egg, larva (caterpillar), pupa (chrysalis), and adult. Each stage has specific adaptations and behaviors that contribute to its overall survival. For instance, the adult butterfly has specialized wings that enable it to fly and search for food sources.
Additionally, the monarch butterfly is part of a more complex system known as the ecosystem. Ecosystems are comprised of living organisms, such as plants, animals, and microorganisms, as well as their non-living environment, including the soil, water, and air. Monarch butterflies play a crucial role within this system as pollinators. While searching for nectar, they inadvertently transfer pollen from one flower to another, aiding in plant reproduction.
Moreover, monarch butterflies are part of a larger population and community. They are social insects that migrate in large numbers between different regions. This behavior is influenced by environmental factors such as temperature and availability of food. The migration of monarch butterflies is a remarkable example of how individuals come together to form a collective system.
In summary, a monarch butterfly can be described as a living system that is one part of a more complex system. Its life cycle, ecological role as a pollinator, and participation in migration all contribute to its integration within the larger ecosystem. Understanding the interconnectedness of living systems is crucial in appreciating the diversity and functionality of the natural world.
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What's the phenotypic and genotypic ratio using a Dihybrid punnett Square?
Answers
The phenotypic and genotypic ratio using a Dihybrid Punnett Square is 9: 3: 3: 1 where the number 9 represents those genotypes with both dominant gene variants.
What is a Dihybrid Punnett Square?A Dihybrid Punnett Square is a graphical representation of a genetic cross between two heterozygous parents to produce the next generation such as for example AaBb x AaBb, where phenotypic and genotypic ratios will be based on the generation of two or more different individuals with the domain traits and only one individual each 16 individual showing both recessive traits. The proportion of this type of genetic cross is equal to 9: 3: 3: 1.
Therefore, with this data, we can see that a Dihybrid Punnett Square can be defined as a diagram where two heterozygous parental lines for a genetic line are crossed to generate progeny, showing a proportion 9 to 3 to 3 to 1.
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Muscle fatigue occurs when the cells run out of oxygen. Without oxygen present, the animal_________ switches to ___________.
Answers
Oxygen deprivation in the cells leads to muscle tiredness. Because oxygen is the last electron acceptor in the chain, mitochondria depend on it to function.
What are mitochondria and what do they do?
The majority of the chemical energy required to drive a cell's metabolic operations is produced by mitochondria, which are lattice cell organelles (mitochondrion, singular). Adenosine triphosphate, a tiny molecule, serves as a storage container for the chemical energy generated by the mitochondria.
Why is the powerhouse of the cell the mitochondria?
Because they are in charge of cellular respiration, the mitochondria are referred to as the "powerhouse" of the cell. Adenosine triphosphate, a type of energy, is released (ATP). It serves as the cell's energy currency.
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What process do yeasts carry out to obtain energy when they are in nutrient mixture such as bread dough?
Answers
Yeasts are single-celled microorganisms that play an important role in the process of fermentation, which is used to produce a variety of foods and beverages, including bread.
In bread dough, yeasts carry out a process known as anaerobic respiration, which enables them to obtain energy from the nutrients in the mixture without the need for oxygen.
During anaerobic respiration, yeasts break down the carbohydrates in the dough, such as glucose and fructose, into simpler compounds such as ethanol and carbon dioxide. This process releases energy in the form of ATP, which the yeasts use to carry out their metabolic processes and to maintain their cellular functions.
As the yeasts consume the sugars in the bread dough, they produce carbon dioxide gas, which causes the dough to rise and gives bread its characteristic texture. The ethanol produced during fermentation also adds flavor and aroma to the bread.
Overall, yeasts play a crucial role in the production of bread, as they provide the energy needed to carry out the fermentation process and create the delicious, fluffy loaf we all know and love.
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many chronic conditions are found to be associated with microbial agents. T/F
Answers
The given statement Many chronic conditions have been found to be associated with microbial agents is true.
including viruses, bacteria, and fungi. These chronic conditions include autoimmune diseases such as rheumatoid arthritis and multiple sclerosis, inflammatory bowel diseases like Crohn's disease and ulcerative colitis, and even mental health disorders such as depression and anxiety.
For example, studies have found that the gut microbiome, which is the community of microorganisms living in our digestive tract, can influence the immune system and contribute to the development of autoimmune diseases. In addition, certain viral infections have been linked to the onset of chronic conditions such as diabetes and cardiovascular disease.
It's important to note that while microbial agents may be associated with these chronic conditions, they are not necessarily the sole cause. Other factors such as genetics, environmental exposures, and lifestyle choices also play a role in the development and progression of these conditions.
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Which correctly lists the terms in order of increasing complexity? (I will give brainliest to the first person who answers)
A. population, community, ecosystem, biosphere
B. community, population, ecosystem, biosphere
C. biosphere, ecosystem, community, population
D. ecosystem, biosphere, community, population
Answers
Answer:
C
Explanation:
The order goes as;
Biosphere, Ecosystem, Community, Population.
Science - SC3206 - TAL
Which statements describe vascular tissue? Check all that apply.
The primary purpose of vascular tissue is to support the plant and help it stand upright,
Phloem carries food made during photosynthesis to other parts of the plant,
Phloem contains the chloroplasts,
Xylem moves water and nutrients throughout the plant,
Xylem is the protective, waxy layer on a plant that prevents water loss,
Answers
Answer:
B
Explanation:
As I think second statement describes vascular tissue.
Answer: b and d
Explanation:
What is the average cropland fraction for the small farms?
A) 10%
B) 25%
C) 50%
D) 75%
Answers
The average cropland fraction for the small farms is option B) 25%.What is cropland fraction? the correct option is B) 25%.
Cropland fraction is the percentage of land used for crops or agriculture. Cropland fraction is calculated as follows: Cropland fraction = (cropland area/total land area) × 100%.Cropland fraction for small farmsCropland is land that is mainly used for agricultural production. The average cropland fraction for small farms varies according to the size of the farm. Small farms usually have a higher percentage of cropland. The average cropland fraction for small farms is around 25%.
The average cropland fraction for small farms can vary depending on the specific region and agricultural practices. However, without further information or context, it is not possible to provide an accurate average cropland fraction for small farms.
The percentage of cropland can be influenced by factors such as farm size, location, climate, crop types, and farming techniques. It can range widely from less than 10% to more than 75%, depending on these variables.
Therefore, without specific information or a defined context, it is not possible to determine the average cropland fraction for small farms.
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How to balance.
NH3+NO---->N2+H2O
Answers
Answer:
4NH3+6NO---->5N2+6H2O
Explanation:
what is the cicle of our organs
Answers
Answer:
S I
Explanation:
Espero ehbetraea daodyu
In many eukaryotic cells, DNA stored in the nucleus is transcribed into messenger RNA. The mRNA is then transported into the cytoplasm where ribosomes assist in their translation into proteins. Finally, these proteins are packaged and sorted in the Golgi apparatus for use in other parts of the cell or in preparation for secretion into other cells. Which of the following statements is supported by this description?
Answers
Answer:
The statement supported by the description of the process of protein synthesis determined by DNA and its packaging and sorted by the Golgi apparatus is that various organelles within a cell interact with each other to carry out life processes (option D).
Explanation:
From the transcription of RNA from DNA to protein synthesis and its packaging and distribution, the participation of organelles is observed:
Cell nucleus: contains the DNA and is where the transcription into mRNA occurs. Ribosomes: where the mRNA is coupled to produce translation and protein synthesis. Rough endoplasmic reticulum: contains ribosomes and participates in the process of membrane protein synthesis, also contributing to their conjugation, glycosylation or sulfonation. Golgi apparatus: it is in charge of receiving synthesized proteins, packaging and distributing them to be sent to the extracellular space or other cells.In this way, the coordination of the functions of various organelles is useful and necessary to fulfill vital functions. The statement that varoius organelles within the cell interact with each other to carry out life processes is, therefore, correct.
The options for this question are:
A. Organelles within a cell act independently of each other at all times
B. Some organelles are more important than other organelles within a cell.
C. Only up to three organelles may interact with each other at any given moment in time.
D. Various organelles within a cell interact with each other to carry out life processes.
4.
The process of photosynthesis produces two very important products for most life forms on Earth. These products are --
A
glucose and oxygen, which are essential for cell respiration in plants and animals.
В.
carbon dioxide and water, which are essential for cell breathing in plants and animals.
nitrogen, which is necessary for protein synthesis.
D.
water, which is necessary to prevent an dehydration
Answers
Answer: A. glucose and oxygen, which are essential for cell respiration in plants and animals.
Explanation:
See image please :)
please help me love you thanks
Answers
Answer:
E.
Explanation:
cyanide binds with at least one protein complex involved in producing atp. if a cell is exposed to cyanide, most of the bound cyanide is likely to be localized within which of the following organelles?
Answers
The correct answer is option (A.) mitochondria
If a cell is exposed to cyanide, most of the cyanide will be found within the mitochondria.
Heme-containing proteins include Fe3+, which cyanide binds to. As a result, the electron transport chain's terminal cytochrome complex IV is inhibited. Cyanide's blockade of complex IV depletes ATP, which leads to cell death. Cytochrome a3 that has been reduced cannot be reoxidized by oxygen. As a result, both cellular respiration and ATP generation are hindered, effectively depriving the cells, tissues, and ultimately the entire body of oxygen. Reduced oxygen saturation and metabolic acidosis develop as a result of hypoxia. The severity of cyanide poisoning is indicated by the degree of lactic acidosis. Plasma lactate is a sign of cyanide poisoning in a collapsed person. Up to 98% of the cyanide in the bloodstream in cases of severe cyanide poisoning is securely attached to red blood cells.
Myocardial depression and a decrease in cardiac output are the secondary responses. The development of VF and cardiovascular collapse follows bradycardia, hypotension, and cardiac arrhythmia.
The autonomic shock brought on by the production of biogenic amines plays a part in severe cyanide poisoning. The observed shock-like state is not due to cytochrome oxidase inhibition, but rather to coronary artery vasoconstriction, which increases central venous pressure. Rhodanese in the liver converts CN to thiocyanate, which is eliminated in the urine.
The complete question is:
Cyanide binds to at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the
a. mitochondria.
b. ribosomes.
c. peroxisomes.
d. Lysosomes.
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Describe how the skin cells, neurons, muscle cells , and blood cells you have observed relate to the functions of skin, nerve, muscle, and blood tissue
Answers
Answer:
The cells and neurons you observed are what skin, nerve, muscle, and blood tissues are made out of.
what is caviar blind taste test
Answers
You'll find that most caviar will have a slight saltiness accompanied by a mild fishy taste. As expected, the taste of caviar tends to resemble ocean water. Besides a mild and fresh taste, quality caviar will also have an unexpected buttery richness that delights the tastebuds.
The roe variety includes caviar. The term "roe" refers to fish's unfertilized eggs, which are among the most scrumptious, intriguing, and beautiful fish eggs in existence. Mother of pearl serving spoons are a wonderful alternative to metal serving spoons, which are known to taint the taste, and are frequently used to serve caviar in a dish on top of a bed of crushed ice.
It's customary to let diners serve themselves caviar from a tray onto toast points and Russian pancakes, called blini. Other toppings like onion, chives, and crème fraiche are frequently served with them.
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