There are no well-documented examples of natural selection operating on natural populations.
a. True
b. False

Answers

Answer 1
False. Because there is documented exhales of natural selection.
Answer 2

The correct answer is B. False

Explanation:

Natural selection is one of the main processes that lead to evolution; this involves organisms in a population being more suitable to survive and reproduce due to specific traits, this causes over the time a population evolves as only organisms with certain traits survives while other organisms disappear.

Natural selection was first officially documented by Charles Darwin based on observations he made on Galapagos Islands and Argentina. Besides this, based on Darwin's proposal many scientists and biologists have documented natural selection in both natural and non-natural populations. A famous example of this is peppered moths in England that changed its color to dark due to the Industrial Revolution making trees darker and therefore making dark moths more suitable to survive. Thus, it is false there are no well-documented examples of natural selection on natural populations because over the years this phenomenon has been plenty documented.


Related Questions

Which picture illustrates the telophase stage mitosis??
PLEASE HELP QUICK

Answers

The right answer is picture B.

The telophase (from the Greek telos meaning "end") is the fifth phase (or the fourth, if we do not count the prometaphase) of mitosis. It takes place twice during meiosis.

During this phase:

* chromosomes without kinetochoric microtubules decondensate;

* the polar microtubules stop their elongation;

* the nuclear envelope is reorganized around individual chromosomes;

* The last phase of the telophase is called cytokinesis. This is the separation of the mother cell into two daughter cells. A division furrow separates the cell in two, under the action of an intracellular contractile ring formed of actin microfilaments that are associated with myosin molecules.

Mitosis the equational division goes up like separating the genetic material of the nucleus into two daughter nuclei and chromosomes reaching out at poles. The correct answer is picture B.

What is the chromosomal equation in mitosis ?

Mitosis is the equational division where the chromosomes number is same there is no change in the chromosomes as it is to maintain the genetics.

Telophase is the fifth along with that the final stage of the mitosis where the genetic material that has been duplicated in the whole of division gets divided into the daughter cells.  

Once the replicated and the daughter cells chromosomes gets to the poles there is the aligning of chromosomes in the poles area.In the stage of telophase the mitotic spindles has been disassembled and the  and the vesicles  containing  fragments of the original nuclear membrane assemble around the two sets of chromosomes as shown in the picture.

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How would you define a lipid? in what sense is the operational definition different from that of proteins, nucleic acids, or carbohydrates?

Answers

fats and its has different elements or a different element

Diabetics can now obtain insulin that has been manufactured by what biological advancement? HGP, hybridization, gene splicing or cloning

Answers

The answer to this question would be: gene splicing or cloning

First, the gene that makes insulin is cut from human cells. After having the insulin gene, the scientist will put it inside bacteria so the bacteria will produce human insulin. This was called gene splicing. 
Then the bacteria have insulin genes, the bacteria will be cloned to make multiple colonies of same bacteria. This phase called cloning. 

Answer:

The answer is gene Spicing

Explanation: After having the insulin gene, the scientist will put it inside bacteria so the bacteria will produce human insulin. This was called gene splicing. Then the bacteria have insulin genes, the bacteria will be cloned to make multiple colonies of same bacteria. This phase called cloning

A long-haired cat (recessive trait s) is crossed with a heterozygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? (Draw a punnett square to help you answer.)
A- 100 percent
B- 50 percent
C- 25 percent
D 0 percent

Answers

It would be 25 percent or C :)

Which explanation justifies why the theory of evolution is a theory and not a law? The theory of evolution predicts an organism's ability to adapt to its environment.
The theory of evolution can be expressed as a simple mathematical statement.
The theory of evolution explains the existence of diverse forms of life on Earth.
Additional evidence will change the theory of evolution into a law.

Answers

THE THIRD ONE I CORRECT

The explanation justifies the theory of evolution is a theory and not a law as the theory of evolution predicts an organism's ability to adapt to its environment is additional evidence will change the theory of evolution into a law. Thus, option C is correct.

What is evolution?

Evolution has been the scientific theory that explains that "a change in the characteristics of biological populations over next generations." According to the scientists RNA has been known as the first existing molecule on the earth that replicate by itself and the process of the evolution lead to advanced forms of life.

These characteristics has been easily trasfered from one generation to other generation. Organisms evolve over the time due to changes in the heritable physical characteristics which has been an example of a scientific theory known as evolution.

Therefore, The explanation justifies the theory of evolution is a theory and not a law as the theory of evolution predicts an organism's ability to adapt to its environment is additional evidence will change the theory of evolution into a law. Thus, option C is correct.

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The maker of a promissory note is the person who is secondarily liable on the note.
a. True
b. False

Answers

Hello There!

The statement above is not true, therefore making your answer B. False.

Hope This Helps You!
Good Luck :) 

- Hannah ❤
the answer is B. False 

jesus knows the answer to everything

Which of the diagrams below shows what one would see in the electron microscope during the transcription of a polycistronic bacterial operon that codes for two proteins?

Answers

The correct answer is: 4

For the first question about the electron microscope diagrams during the transcription of a polycistronic bacterial operon that codes for two proteins:

In polycistronic operons, multiple genes are transcribed into a single mRNA molecule. This mRNA molecule contains information for the synthesis of multiple proteins. In electron microscopy, you would see the transcription process as a continuous strand of RNA being synthesized. Among the given options, the correct choice would be: D

As for the second question about the number of different polypeptides translated from the [tex]mRNA 5'-GUAGUAGUAGUA... - $3^{\prime}$:[/tex]

The start codon for translation in most organisms is AUG. However, the given mRNA sequence does not start with AUG, and it's mentioned that translation does not need to start at AUG.

In this case, every codon in the mRNA sequence GUAGUAGUAGUA could potentially serve as a start codon. This means that the reading frame can begin at any of the four GUA codons. Therefore, there are 4 different potential reading frames, and each would produce a different polypeptide.

So, the correct answer is: 4

The complete question is:

Consider the diagrams.

Which of the diagrams shows what one would see in an electron microscope during the transcription of a polycistronic bacterial operon that codes for two proteins?

C

D

A

B

A messenger RNA 5'-GUAGUAGUAGUA... - $3^{\prime}$ is translated in a test tube where translation does not need to start at an AUG. How many different polypeptides would you expect to be translated from this mRNA?

1

3

0

2

The number one factor for determining what living things can survive in a body of water is

Answers

temperature , density, depth and salinity

Identify flower structures and match those structures to specific functions

Answers

The flower structures are identified above:

The functions are as follows.

Petal- large and brightly coloured to attract insects.

Sepal- protects the flower whilst in bud.

Stalk- supports the flower to make it easily seen by insects, and to be able to withstand the wind.

Stamen- male reproductive organ of the flower, made up of the anther and filament.

Anther- contains pollen sacs, in which pollen grains are formed. Pollen contains the male sex cells.

Filament- supports the anther.

Carpel- female reproductive organ if the flower. Made up of the stigma, style and ovary.

Stigma- sticky surface to the ovary, through which pollen tubes grow.

Style- links the stigma to the ovary through which pollen tubes grow.

Ovary- contains ovules which form into seeds when fertilised.

Hope this helps! :)

List the 2 bones that produce elbow flexion/extension. 3320

Answers

The 2 (TWO) bones are the:
_____________________________
1)  ulna ; AND:
2) radius .
_____________________________

In the spring of 2007, the bear population of Aroostook County, Maine increased by 400 bears because they mated and had offspring. This is an example which shows that all living things ____. A. respond to their environment B. have homeostasis C. can reproduce D. have cellular organization

Answers

Of all the choices, C. is the most reasonable
The answer is C. All living things can reproduce. 

A registered nurse on the neonatal unit appropriately uses the chain of command when she

Answers

The chain of command is the line of authority that a nurse must follow. If a registered nurse on the neonatal unit is presented with a situation that requires authorization. She must first speak with the charge nurse for assistance. If this fails, she must then look to the department director of nursing for the neonatal unit. Then, she must contact the Chief Nursing Officer or the Chief Executive Officer, depending on the nature of the issue. Finally, she must always remember to document the situation at hand and document the communication that was had. This is how a registered nurse on the neonatal unit appropriately uses the chain of command.

Which of the following can result in irregularities leading to cancer?        A. The body using cyclins to regulate the timing of the cell cycle   B. The body utilizing growth factors in development   C. The body programming its cells to die   D. The body failing to respond to signals that slow the cell cycle

Answers

The body failing to respond to signals that slow the cell cycle. D

The correct answer is (d) The body failing to respond to signals that slow the cell cycle.

The normal cells get converted into cancerous cells when the body fails to respond to the signals that slow down the cell cycle. As a result of this the normal cells keep on dividing and becomes cancerous in nature. They form a mass of cells called tumors that can also be transferred from one place of body to another. These cells also damage the tissues of surrounding. Cancer is caused due to failed mechanism of cell cycle.




For cats, the main determinant of a food's palatability is its protein content. for cats, then, food tastes especially good when it activates _____ receptors in the gustatory system

Answers

When it activates the G protein-coupled receptors. (Or glutamate receptors more specifically.) These receptors are in the base of the savory/umami taste that is usually associated to a more meaty/protein taste. Cats tend to like all that is described having this umami taste.

Final answer:

For cats, the main determinant of a food's palatability is its protein content. for cats, then, food tastes especially good when it activates umami receptors in the gustatory system .

Explanation:

For cats, food tastes especially good when it activates umami receptors in the gustatory system. The taste known as umami is often referred to as the savory taste, and it is based on the activation of G protein-coupled receptors by a specific molecule, which in the case of umami is the amino acid L-glutamate. This is why cats, who require a diet high in protein, find foods with higher protein content more palatable, as proteins are rich in amino acids like L-glutamate that activate these umami receptors.

What is a possible explanation for the "jump" in stan's length at 3 months of age?

Answers

Three months of age is a typical time for a major growth spurt. Gaining weight, growing in length are common at this age. He may begin eating a lot more as well.
The possible explanation for the "jump" in stan's length at the age of 3 months may be because of genetics. Genetics is defined as the study of genes, heredity in living organism and genetic variation. In human beings, according to the expects, it is estimated that there are 60,000 to 100,000 genes (made up of DNA) 46 chromosomes. 

where does almost all the energy that drives life on the earth originate

Answers

Final answer:

The sun is the primary source of energy for life on earth. It provides the energy for photosynthesis, which supports plant life and indirectly, all other life.

Explanation:

Almost all the energy that drives life on earth originates from the sun. This energy is captured by plants through the process of photosynthesis. During photosynthesis, plants convert sunlight, carbon dioxide, and water into glucose and oxygen. The glucose provides energy for the plants to grow, and is also consumed by animals when they eat plants. Thus, the sun's energy is transferred through the ecosystem. Without the sun, most forms of life on earth would not exist.

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images observed under the light microscope are reversed and inverted . explain what this meand

Answers

This means that any images seen to the right would be switched to the left, and vice-versa.

Final answer:

The optics of a microscope's lenses invert the image, resulting in a specimen appearing upside-down and reversed from its original orientation. This effect is due to the way light is manipulated by the microscope's dual-lens system. Certain types of microscopes include additional systems to correct this inversion.

Explanation:

The optics of a microscope's lenses dramatically alter the orientation of the image seen by the user. When a specimen that is oriented right-side up and facing right on the microscope slide is observed through a microscope, it will appear upside-down and facing left, and vice versa. This inversion happens because microscopes utilize two sets of lenses to magnify the image. How light travels through these lenses results in the observed image being flipped. Essentially, this dual lens system produces an inverted image. In contrast, binocular or dissecting microscopes, despite working similarly, incorporate an additional magnification system that corrects this inversion, presenting the final image as upright.

Which structure does not belong in a prokaryotic cell

Answers

i believe the nuclear membrane

which of these features formed by glacier is shaped like an armchair?

A. Horn peaks

B. Fjords

C. Roche mouton need

D. Cirques

Answers

the answer is d cirques

how can you tell which is the highest elevation on a topographic map

Answers

Multiply by the contour interval, or you can add/subtract the result from then nearest contour line.

Herpes can be passed via oral sex. True or False

Answers

If this is a really a educational question...

yes, it can

hope this helps
yes.....its true...................................

Which group of organic molecules includes glycogen and glucose?

Answers

Carbohydrates include glycogen and glucose.
Final answer:

Polysaccharides, such as glycogen and glucose, belong to the group of organic molecules that store energy and serve as structural components. They are complex sugars made up of multiple monosaccharide molecules. Glycogen, a branched polymer of glucose, serves as the primary energy storage molecule in animals.

Explanation:

The group of organic molecules that includes glycogen and glucose are polysaccharides. Polysaccharides are complex sugars made up of multiple monosaccharide molecules. Examples of polysaccharides include starch, glycogen, and cellulose. Glycogen is the primary energy storage molecule in animals and is composed of branched chains of glucose molecules.

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Black-bellied seedcrackers are a species of bird found in central africa. they live in various habitats where individuals eat either hard, large seeds or small soft seeds. individuals with thick, shorter beaks can eat the harder seeds. individuals with thin, longer beaks can eat softer seeds. individuals with beaks of intermediate thickness and length cannot really eat either type of seed very well. if you measured beak width and length in populations of black-bellied seedcrackers, what type of selection would you expect to find?

Answers

It's an example of disruptive selection/ diversifying selection.

In disruptive selection  the extreme values for a trait are favored over intermediate values. In this case, the favored traits are long beaks because they have seeds they can eat and the short beaks, for the same reason.
The intermediate type of beak is the less fit for this environment.




Nitrogen-fixing bacteria remove nitrogen from plants and return it to the soil. true or false?

Answers

The answer is:  [B]:  "False" . 
__________________________________

which process usually requires water

A. Chemical weathering

B. Erosion

C. Physical weathering

D. mass wasting

Answers

Which process usually requires water?

Answer: Chemical weathering

hope this helps
Chemical weathering

At what level do we "experience" reality? empirical level abstract level primary level secondary level

Answers

You experience reality when you get smoke a blunt

The level at which we "experience" reality is EMPIRICAL LEVEL.

The empirical level is a level of knowledge that can be verified by experience or observational data, thereby relying upon observation and/or physical evidence as opposed to theory.

Empirical evidence is based on observational and/or experimental phenomena which are properly measured by an individual.

The empirical level is a completely mind-dependent level based believe what we perceive to be accurate.

In conclusion, the level at which we "experience" reality is EMPIRICAL LEVEL.

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When reporting an encounter for screening of malignant neoplasms of the intestinal tract, what does the fifth character indicate?

Answers

That anatomic Location is being screened in the intestinal track. 

Answer:

Anatomic location being screened in the intestinal tract.

Explanation:

If it is necessary to report an appointment for screening for malignant neoplasms of the intestinal tract, which the fifth character indicates that the anatomical location being tracked in the intestinal tract.

Malignant neoplasm, cancer or malignant tumor, is characterized by uncontrolled and abnormal proliferation of cells due to changes in DNA or lifestyle habits, and these cells can spread throughout the body and compromise the body in general. Despite the malignant cells proliferating in an autonomous and uncontrolled way, the early diagnosis of the malignant neoplasm and the rapid initiation of treatment can result in a cure, improving the person's quality of life.

What are the smaller parts that make up nucleic acids

Answers

The smaller parts are molecules.molecules are so small that there in everything.they multiply like crazy they plot in half grow then split in half again.Theres about 1,000,000,000,000,000 in our body

Which organism is unicellular and possesses a feeding groove?

Answers

The organism is EUGLENA SPP.
Euglena spp is a genus of unicellular flagellate organisms which can produce their own food and at the same time some eat already prepared food, thus they has characteristics of both plants and animals. Euglena species are usually found in streams, rivers, marshes and other water habitats. Euglena spp use their feeding groove to filter the water and get small food particles inside the water.

Dense Denise is an emergency room nurse at Hopeless Hospital. She notices that the hospital is running short on blood, so she decides to dilute the blood with water to make it last longer. Later, Dr. Dingo, the attending physician gets ready to give a patient a transplant. As a precaution, he puts a sample under the microscope, sees this image. He immediately begins angrily barking at Denise. What happened to the blood cells?

Answers

When Denise mixed the blood with water, it formed Osmosis. There is water in the blood as well as a concentration of salt.

Answer:

The answer to the question: What happened to the blood cells, when Denise, the nurse, put the blood samples with water, to dilute the blood so that it would last longer, is, that the blood cells, through the process of osmosis, took in the water around them, swelled and ruptured.

Explanation:

Usually, when putting a pack of red blood cells inside a water solution will activate the cellular process of osmosis, which means, that the membrane of the cell allows water to trickle into it, as the volume of water outside the cell is higher than inside. In the process of equilibrium of concentration, the cell allows the water in, but it reaches a point when the amount in is too much and thus the cell bursts. What Dr. Dingo found under the microscope, then, was the red blood cells burst due to the water.

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