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3 years ago

An elongated tailbone occurs rarely in some newborn children. What does the presence of a tailbone indicate?

1 answer:

4 0

It's because the genome has undergone mutation which means the foetus has a post anal tail and when the fetus matures the genome triggers absorption in development to remove unnecessary components by disintegrating the unnecessary cells (webbing, tail, etc). When this is not removed it is because the genome did not send the signal for absorption.

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Identify the type of mutation shown in the diagram, with respect to chromosome 20.

melomori [17]

Here are the choices: 
(a) deletion(b) inversion (c) duplication(d) insertion
Answer: (d) insertion
This mutation occurs when (an) additional nucleotide base pair/s attach themselves into an existing DNA strand. This can possibly result to diseases such as cystic fibrosis and myotonic dystrophy.

6 0

3 years ago

Why doesn't air temperature change uniformly with altitude?

babunello [35]

Altitude doesn't change uniformly because the four main layers of the atmosphere have different temperature gradients, creating the thermal structure of the atmosphere.

7 0

3 years ago

If our eyes were sensitive only to x rays the world would appear __________.

maxonik [38]

If our eyes were sensitive only to x rays the world would appear dark because X-ray light does not reach Earth's surface.

6 0

3 years ago

masteringbio JFor each of the studies described below, indicate if it is hypothesis driven and whether the scientist is employin

juin [17]

Incomplete question. The remaining part of the question read;

Words in the left column:

Yes
No
Observational
Manipulative

1. A physiologist incubates eggs in the lab at a range of temperatures to see what temperatures produce males and what temperatures produce females.

2. A biologist predicts that shade might influence ground temperature, and therefore turtle sex ratios. He records the sex ratio of turtle hatchlings in shaded and unshaded regions

3. An ecologist predicts turtles grow larger when no predators are around. She places turtles in an experimental pond system where half the ponds have predators and half the ponds have had the predators removed.

4. A climatologist predicts that concentration of CO2 in a city will be negatively correlated with the amount of wind in that city. He collects data and looks at the amount of CO2 in a city as a function of the wind speed in the city.

5. A sociologist conducts a survey in Hawaii to describe people's attitudes about global climate change.

6. A scientist determines the average wind speed, and variation in the amount of wind, in a number of locations to see which locations would be most suitable for wind turbines

Answer/Explanation:

1. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

We can make this conclusion here that the physiologists' research is hypothesis-driven since we are told he wanted to "see what temperatures produce males and what temperatures produce females." In other words, he wanted to know whether the temperature used in incubators can influence the sex of an egg by means of observation.

2. Hypothesis-driven? Yes!

Observational or Manipulative? Observation.

3. Hypothesis-driven? Yes!

Observational or Manipulative? Manipulative.

We can make the conclusion that is the ecologist used the manipulative method in her research since she decided to place the turtles in two different types of ponds; one where half the ponds have predators while in the other the pond the predators have been removed. In other words, she manipulated the independent variables.

4. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

Note, the use of the word, "predicts" in most instances underscores the tone of hypothesis-driven research, hence we can say Yes! And remember, we are told the researcher "collects data", meaning he is merely observing differences that occur naturally.

5. Hypothesis-driven? No!

Observational or Manipulative? Observational.

6. Hypothesis-driven? No!

Observational or Manipulative? Observational.

5 0

3 years ago

All of the following are major functions of proteins except 1.control of biochemical reactions. 2.support for organs or tissues.

Galina-37 [17]

Answer:

<h2>5.storage of energy</h2>

Explanation:

Proteins are important biomolecules that are a type of macromolecule.
This macromolecule is made up of a monomer that is called amino acid.
There are many functions of the protein molecules in living organisms.
They play an important role as bodybuilding molecules, as enzymes, as transporter molecules, and many more.
Most of the enzymes are made up of the protein molecules and regulate the metabolic process of the living organisms.
Certain proteins are present in the plasma membrane of the cells and play an important role in the transport of the substances across the cells, recognition of certain foreign particles, and some other functions.
They also play an important role in the immune system.
The main storage molecules of energy are carbohydrates and fats so storage of energy is not considered as the major function of the proteins because they do not involve as carbohydrates and fats.

4 0

3 years ago