Why are vestigial structures considered critical evidence of evolution?

Answers

Answer 1
Vestigial structures are considered evidence since scientists believe they are structures that were once used by a species ancestors but are no longer needed. They do not impair the organisms in any way, so there is no need for evolution to get rid of them. Vestigial structures are anatomical features that no longer seems to have a function or purpose in the current form of an organism of the given species. Examples are wisdom teeth, the muscles of the ear, the appendix, the tail bone among others in human. 

Related Questions

N ________ a single sperm cell from the man is injected using a microscopic needle, directly into each harvested egg from the woman. the resulting zygote is then transferred after a few days into the woman's uterus.

Answers

Microinjection is a simple mechanical process usually involving an inverted microscope with a magnification power of around 200x (though sometimes it is performed using a dissecting stereo microscope at 40–50x or a traditional compound upright microscope at similar power to an inverted model).

molecules tend to move from an area where they are more concentrated to an area where then are less concentrated. this process is called________?

Answers

The process is called diffusion hope it helps

The goal of computer forensics _____.

is to obtain all the evidence available
is to maintain a secure environment
is to analyze the evidence and determine what happened
is to produce admissible evidence without altering any of the information

Answers

The goal of computer forensics is to obtain all the evidences available and then to analyse the evidence and determine what has happened. At the same time it goal is to produce admissible evidence without altering any of the information.

Answer:

The answer is option D.

Explanation:

The objective of PC crime scene investigation is to acquire every one of the confirmations accessible and after that to examine the proof and figure out what has occurred. In the meantime it objective is to create acceptable proof without adjusting any of the data.

the part of the stomach that lies above the esophagus is the:the part of the stomach that lies above the esophagus is the:

Answers

The correct answer is the fundus.

The stomach is divided into parts of which the fundus is the second; it stores all the undigested food and the gases that are released from the chemical breakdown of the food we eat.

After Dante catches the flu virus, he feels very tired and loses his appetite. His body aches and he gets a high fever. Which best describes Dante’s symptoms? they are a response to an infection, which is an internal stimulus they are a response to being tired, which is an external stimulus they are a response to hunger, which is an internal stimulus they are a response to an illness, which is an external stimulus

Answers

it would be which is an internal stimulus they are a response to an illness

Answer:

it would be which is an internal stimulus they are a response to an illness

Explanation:

Which of the following is an example of active transport?
chromosomes migrating during cell division
water diffusing throughout the cytoplasm of a cell
cilia moving rapidly to propel a single-celled organism through water
proteins moving ions from low to high concentration across a cell membrane

Answers

I think it is the proteins moving one :)

Proteins move ions from a lower concentration to a higher concentration across a cell membrane is an example of active transport. Therefore, option D is correct.

What is active transport?

Active transport is a cellular process in which molecules or ions are moved against their concentration gradient, from an area of lower concentration to an area of higher concentration. It requires energy input from the cell in the form of ATP (adenosine triphosphate) or another source of energy.

It can occur through various mechanisms, including primary active transport. It directly uses energy from ATP hydrolysis. Secondary active transport uses the energy from the electrochemical gradient established by primary active transport to move other molecules or ions against their concentration gradient. Therefore, option D is correct.

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Which water-soluble vitamin can regenerate vitamin e after it has been oxidized? vitamin b6 folate vitamin c vitamin b12?

Answers

It is vitamin C that can regenerate vitamin E after it has been oxidized.

Vitamin C can regenerate vitamin E after it has been oxidized. So, the correct option is (C).

What are vitamins?

A vitamin is defined as an organic molecule that is an essential micronutrient that an organism requires in small amounts for the proper functioning of its metabolism. Essential nutrients cannot be synthesized in the organism, either at all or not in sufficient amounts, and must be obtained through the diet.

These are a group of substances that are essential for normal cell function, growth and development. There are 13 essential vitamins needed by the body to function properly.

There are two types of vitamins: water-soluble and fat-soluble. Fat soluble vitamins involve vitamins A, D, E, and K. Water soluble vitamins involve vitamin C and the collection of B vitamins, Vitamin C can regenerate Vitamin E after been oxidized.

Thus, Vitamin C can regenerate vitamin E after it has been oxidized. So, the correct option is (C).

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What list is composed of substances widely used for many years without apparent ill effects?

Answers

The list that is composed of substances that are widely used for many years without apparent ill effects is the GRAS. GRAS is an abbreviation for generally recognized as safe; it is an American food and drug adminstration designation where chemical or substance added to food is considered safe by experts, and therefore, it is exempted from the usual federal food, drug, and cosmetic Act. 

The following data table summarizes the number of differences in amino acid sequences found for four different species. Amino Acid Dissimilarities for Beta Hemoglobin Protein A B C D A 8 3 5 B 0 1 C 5 D Based on the data table, which two species are most closely related? A. species A and species B B. species B and species D C. species B and species C D. species C and species D

Answers

The correct answer is species B and C.

As you can see in the diagram presented below, all of the other species have a number of differences between their amino-acid sequences, but in the case of species B and C there are no differences. This implies a close evolutionary relationship between the two species.

Answer:

Species B and C

Explanation:

Just had it on Study Island :)

Name two prey adaptations how does each adaptation protect the organism

Answers

Final answer:

Prey utilize adaptations such as camouflage to blend with their environment and mimicry to imitate more dangerous organisms, both of which enhance their survival prospects by discouraging predation.

Explanation:

Two prey adaptations that help protect organisms from predators include camouflage and mimicry. Camouflage allows prey to blend in with their surroundings, making it harder for predators to spot them. This can involve coloration, patterns, or shapes that resemble the environment. For example, a moth with wing patterns that resemble tree bark would be less visible to both predators and competitors. Mimicry, on the other hand, involves an organism adopting the appearance of another, usually more dangerous or unpalatable species. A classic example is a non-poisonous dart frog mimicking the bright colors of a poisonous species, thus deterring predators who might mistake it for the toxic variety.

What should police officers do to prevent false identifications during lineups?

Answers

To prevent false identifications during lineups, the police officers should tell the witnesses that the lineup may not include the suspect. The eyewitness identifications are subject to a high rate of error because witnesses are subject to high stress or anxiety, the human memory tends to reconstruct incidents because humans do not have the capability to record memories like a video recorder; witnesses often focus on weapons, and not the identification of the perpetrator, among other reason. 

Jamie eats 240 gm of carbohydrate, 220 gm from fat, and 132 gm of protein each day. what is jamie's daily caloric intake

Answers

Jamie's daily caloric intake is 592 gm.

Answer: To determine the caloric intake,

240 grams of carbohydrate is equivalent to 240*4 calories per gram of carbohydrate=960 calories from carbohydrate

132 grams of protein is equivalent to 132*4 calories per gram of protein=528 calories

220 grams of fat is equivalent to 220*9 calories per gram of fat= 1980 calories

Therefore, the total calorie intake is (1980+528+960) calorie=3468 calorie is consumed by Jamie daily.

[tex] 240 grams of carbohydrate is equivalent to = 240*4 calories per gram of carbohydrate=960 calories from carbohydrate

132 grams of protein is equivalent to 132*4 calories per gram of protein=528 calories

220 grams of fat is equivalent to 220*9 calories per gram of fat= 1980 calories

(1980+528+960) calorie=3468 calorie [/tex]

which biomolecule builds bone and muscle

Answers

The answer is protein.

A chronic disease caused by deficient activity of the islets of langerhans is

Answers

Diabetes mellitus is a chronic disease that is caused by deficient activity of the islets of Langerhans. The islets of Langerhans is a part of the pancreas that secrets the hormone insulin, a hormone that functions to allow the utilization of glucose by the body, and therefore maintaining the glucose levels from getting too high. Diabetes mellitus is as a result of the inactivity of the insulin hormone and therefore there will be a high level of glucose in the blood. 

Are things around us usually made of pure elements or combinations of elements?

Answers

Things around us are usually made up of combinations of elements. These combinations are called molecules. Molecules make up combinations called compounds.

Water is an example. There are 2 oxygen atoms and 1 hydrogen atom (oxygen and hydrogen are elements). Together there molecules make up H2O (water) which is a compound.

I hope this makes sense! I'm happy to answer any other questions you might have :)

Most of the things around us are combinations because if they were all pure elements then some would be very haazradous and could take the lives of many people like radium the rays of radium and any other radioactive elements like X rays they are actually bad for you but they arent as harful as any other rays. Uranium is one of the elements that can tell us if there are any rays. Other elements like magnesium is very thin and flammable, and magniesieum is harmful is consumed sometimes it is used in medicine and if that medicine is taken way to much then the person consuming it would have stomache cramps and facial ticks and have a risk of death. And water is not an elements water is a molecule, made of 2 hydrogen and one oxygen. Carbon dioxide is an element.....I think but it is made of carbon and 2 oxygens. I hope this brings out the idea that most elements around us are actually made of several elements so its a combination (molecule). Hope this helps. :)

Protein's structure formed by folding, coiling, and aggregation of polypeptides that is induced by distant residues in the chain is called what?

Answers

Protein's structure formed by , folding, coiling and aggregation of polypeptides that is induced by distant residues in the chain is called the Quaternary structure of proteins. It is the number and arrangement of multiple folded protein subunits in a multi-subunit complex. A variety of bonding interactions including hydrogen bonding, salt bridges, and disulfide bonds hold the various chains into a particular geometry. 

In which part of a flower is pollen produced

Answers

Pollen is produced in the stamen.

Stamen is the male reproductive part of a flower that produces pollen. The stamen is composed of a slender filament and a compact body called anther. The anther within the stamen is where pollen is produced. The anther is supported by the filament. Hundreds of stamens or only few stamens may be found in a flower.

Answer: Pollen is produced in the stamen.

Explanation:

A change in the frequency of any mutant allele in a population most likely depends on the

Answers

Final answer:

The frequency of any mutant allele in a population can depend on factors like the presence of beneficial alleles, chance events, successful reproduction, and abnormalities. The allele frequency changes due to selective pressures, where advantageous alleles become more common through natural selection.

Explanation:

A change in the frequency of any mutant allele in a population most likely depends on a variety of factors, among which are the frequency of beneficial alleles, the effect of chance on a population's gene pool, successful reproduction, and the presence of any abnormalities in a population.

The allele frequency is the rate at which a specific allele appears within a population. Evolution in the context of population genetics is defined as a change in the allele's frequency in a population. One way allele frequency can change is through natural selection, where alleles that confer advantageous traits can lead to more successful reproduction and thus increase in frequency over time. For instance, using the ABO blood type system, if an allele like IA becomes more common because it confers a survival or reproductive advantage, the frequency of that allele in the population's gene pool will increase, illustrating evolutionary change.

It is also important to note that allele frequencies must always add up to 100 percent, indicating that a change in one allele's frequency impacts the frequencies of others. Studies, such as those on the peppered moth, help scientists track how selection forces influence allele frequencies, providing insight into the selective pressures acting on a population.

What is true about the number of organisms in an ecosystem?

Answers

It is has a mass of biodivesity

A fruit fly has four pairs of chromosomes in its cells. at meiosis, how many different combinations of maternal and paternal chromosomes are possible in the gametes?

Answers

Answer: 16 combinations

A fruit fly has four pairs of chromosomes in its cells. Assuming all pair is heterozygotes, each pair of the chromosome can be divided into two possible combinations. So, if there are 4 pairs then the possible combination would be 2 * 2 * 2 * 2= 16 possible combinations.

Organic molecules store _________energy in their ______________bonds. select one:
a. kinetic; ionic
b. potential; covalent
c. potential; ionic
d. kinetic; hydrogen
e. kinetic; covalent

Answers

B) Potential; Covalent

Organic molecules store potential energy in their covalent bonds.

Explanation:

Organic molecules, which are the building blocks of life and include compounds like carbohydrates, lipids, proteins, and nucleic acids, are composed of carbon atoms bonded to other atoms such as hydrogen, oxygen, nitrogen, and phosphorus. These bonds are primarily covalent bonds, where atoms share electrons to form stable molecular structures.

The potential energy stored in organic molecules is a result of the arrangement of these covalent bonds. When chemical bonds are formed between atoms, energy is invested in breaking the original bonds, and this energy is stored as potential energy within the newly formed molecule. This potential energy can be released or harnessed during chemical reactions, such as metabolism or combustion, to perform work or provide energy for cellular processes.

The distinction between potential and kinetic energy is essential. Potential energy is energy stored in an object due to its position or state, while kinetic energy is the energy of motion. In the context of organic molecules, the potential energy resides in the chemical bonds, and it can be converted into kinetic energy when these bonds are broken, and chemical reactions occur, releasing energy for various biological and physical processes.

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The plate pictured is from a past student. what is the most likely conclusion?

Answers

It was practiced and taught to them firstly.

Describe three abiotic factors that influence this ecosystem

Answers

-Temperature
-sunlight
-water

Among all the hydrothermal areas in the world, the greatest concentration of activity is along the firehole river in ________. among all the hydrothermal areas in the world, the greatest concentration of activity is along the firehole river in ________. iceland california south africa wyoming spain

Answers

Among all the hydrothermal areas in the world, the greatest concentration of activity is along the Firehole river in Wyoming. The Firehole River is located in northwestern Wyoming, and is one of the two major tributaries of the Madison River. The river flows north about 34 km from its source in Madison Lake on the Continental Divide. 

The correct answer is D. Wyoming

Explanation

Hydrothermal activity is a natural phenomenon that originates similarly to volcanic activity, because a crater is formed that emanates water at high temperatures from time to time, this is due to the fact that in the earth's crust it forms cabins in which it is housed the water, which heats up with the magma causing the pressure to increase, which causes the water to be fired by the crater.

The Firehole River is an American river thirty-four km long, located in the state of Wyoming in the northwest of the country, this river is characterized by hydrothermal activity, it is also part of the Yellowstone National Park where it is at least half of the geothermal activity in the world. This river runs until it connects with the Gibbon River, additionally, it is part of the system of rivers that make up the Missouri River. So, the correct answer is D. Wyoming.

While walking along a streambed, you encounter a reedy seedless plant. upon closer inspection, you determine that the stems contain large amounts of silica and have tiny scale-like leaves. this plant is most likely a?

Answers

For the answer to the question above, this plant is more likely a kind of "liverwort plant"
they are flowerless and they are spore-producing plants and non-vascular. There are estimated of 9,000 species of this kind of plant.
I hope this helped

Irreversible nerve damage may be caused by excessive intake of _______ supplements.

Answers

The answer is the vitamin B 6 supplement can cause irreversible nerve damage. Taking too many vitamins can cause also a toxic effect on our body.  Too much vitamin B6 can also cause oversensitivity to sunlight, which can lead to skin rashes and numbness, as well as nausea, vomiting, abdominal pain, loss of appetite, and abnormal liver function.

According to the cellular clock theory, after about 70 or 80 replications, the cell can no longer reproduce and the ________ are dramatically reduced.

Answers

According to the cellular clock theory, after about 70 or 80 replications, the cell can no longer reproduce and the telomeres are dramatically reduced.  

Cellular clock theory is one of the biological theories of ageing. Leonard Hayflick first suggested this theory and he found that cells can divide maximum 100 times during the life. He showed that cells isolated from individuals between 50 and 70 years old had divided fewer than 100 times and that the total number of cell divisions was roughly related to the age of the individual.

Gerd damages what part of the gastrointestinal tract?

Answers

GERD damages the esophagus

Hurricanes generally are ________.
a.larger than tornadoes
b.smaller than mid-latitude cyclones
c.areas of heavy rainfall and strong winds
d.all of these

Answers

C. areas of heavy rainfall and strong winds
im 99% sure that the answer is D. all of the above

Corrina is a 25-year-old pregnant woman. her need for _____ is 50% higher than before she became pregnant. folate calcium vitamin d vitamin c

Answers

Answer: folate 

In pregnancy, some of the nutrient need will be increased because the mother needs to supply for the child too. One of the substances that needed by the child would be folate. It is needed to form the neural tube that will become the nervous system, the brain and the spine.
Folate or folic acid can be found in green leaves vegetables.
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Children with _____ self-esteem tend to attribute failure to their personality deficiencies, which they believe they are unable to change. Elly buys 75 shares of stock in a mutual fund for a total investment of $450. She sells 50 shares of her stock for total proceeds of $400. Determine if Elly made a profit or loss, and how much per share.a.loss of $0.67 per shareb.loss of $2 per sharec.profit of $0.67 per shared.profit of $2 per share do you agree with the transcendentalism perspective? The frequency of a dominant allele r in a population is 0.4. what is the frequency of the recessive allele, r? 0.3 Where would you expect to find a chain of volcanic mountains on the map below? A B C D Use this map to answer the following question:It shows the 4 major islands of Japan along with its many surrounding islands along with its proximity to South Korea, Russia, and China. 2012 The Exploration CompanyWhat feature of Japan made it difficult to unify and govern? Many different religions Diverse and numerous immigrants Lacking communication with other nations Consisting of many islands What is the range of the function graphed below? What is the key to effective search for information as you prepare for your presentationA. prewritingB. strong research skills c. parahrasingD. drawing conclusions? According to Newton's Law of Cooling, if a body with temperature T 1 is placed in surroundings with temperature T 0, different from that of T 1, the body will either cool or warm to temperature T(t) after t minutes, where: T(t) = T 0 + (T 1 - T 0)e kt and k is a constant. A cup of coffee with temperature 140F is placed in a freezer with temperature 0F. The constant k -0.0815. Use Newton's Law of Cooling to find the coffee's temperature, to the nearest degree Fahrenheit, after 15 minutes. The temperature is about a0degrees Fahrenheit. Astronauts who visit and stay at the International Space Station are also scientists because theyA)participate in the race into space.B)collect data to improve mans knowledge of space.C)predict weather on Earth using satellite pictures.D)travel out of the space station and repair damage to the exterior. the length of johns patio is 5 feet less than 3 times the length of howards patio .johns patio has a length of 40 feet . what is the length of howards patio the Aleutian island chain that separates the Pacific Ocean from the Bering Sea can also be defined asA)a deltaB)an isthmusC)a peninsulaD)an archipelago PLEASE HELP ME ILL GIVE U A BRAINLIST a man who is 6 feet tall cats a shadow that is 15 feet long.A tree casts a similar shadow is 22 FT how tall is the tree? The Lend-Lease Act was an attempt by the United States to What is the purpose of the spine of vegetation in the Fusionopolis building? Check all that apply. It insulates the complex in the summer. It insulates the complex in the winter. It provides passive cooling in the summer. It provides passive cooling in the winter. Read this excerpt from a speech by president harry s. truman: if they were to succeed, the united states would be numbered among their principal victims. it must be clear to everyone that the united states cannot and will not sit idly by and await foreign conquest. the only question is: what is the best time to meet the threat and how is the best way to meet it? which phrase is most clearly meant to evoke fear in the listener? Explain how the discriminant b squared minus 4 ac can be used to determine the number of solutions to a quadratic equation Twenty-five percent of 66 is ______ (Financial Algebra workbook 10-3)Under his "Household expenses" Budget category, Mark has allocated $60 per month for pet food. He can purchase "wet food" for $1.50 per can or "dry food" for $3 per bag.E). Name a combination of bags and cans that will cause him to be over budget. Organic compounds are more plentiful in the human body because carbon