BIOLOGY HIGH SCHOOL

A closed glass jar contains water vapor. The jar cools and liquid water begins to form. What will happen to the mass of the container as the liquid water is forming?

Answers

Answer 1
Answer: It will stay the same. 

The mass isn't going anywhere (You did mention the jar was hypothetically and therefore hermetically sealed) 

The only thing changing here is the density of the water in the jar (whether it be vapor, liquid or otherwise)
as the temperature drops and the vapour becomes liquid, the water will be more dense. 

that's not saying that the weight won't increase as that is controlled by the force gravity exerts on the mass. (Hint: water is much more affected by gravity than air is)

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if pepsin was mixed in a laboratory with sugar molecules like glucose, what is the MOST LIKELY result?

Answers

 pepsin with brake down the glucoses molecules

Which human activity has aggravated the ecological issue of global warming?

Answers

The burning of fossil fuels, deforestation (sedimentation and the following green-house gas emissions) are two examples.More-so even is the destructive effects of globalization and urbanization on the ecosystems.

1. Which of the following is true about chemical energy?A. Chemical energy can be stored more efficiently as glucose than it can be as ATP.
B. Chemical energy is stored when bonds in ATP are broken to form ADP.
C. Chemical energy is released when bonds in ADP are broken to form ATP.
D. Chemical energy can only be stored as ADP.

Answers

What is true of chemical energy is that chemical energy can be stored more efficiently as glucose than it can be as ATP. All the other answers in this case don't really apply. The correct answer is therefore A.

When ATP is broken down to ADP we get a release of energy - B and C are therefore wrong. Energy is broken in more ways as only ADP - D is also wrong. Only A stays as the correct answer. 

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A researcher has decided to lesion different parts of a cat’s brain and observe the effects on the cat’s behavior. After the surgery, the researcher notices that the cat is having trouble walking in a straight line. The cat also does not respond to the researcher randomly blowing a whistle like it did before the surgery. The researcher also noted that the cat’s sleep/wake cycle has changed since the surgery. What part of the brain did the researcher most likely lesion?

Answers

Answer:

reticular formation

Explanation:

  • A matrix consisting of nerve fibers as well as cell bodies of the neurons that form a greater part of the core of the brainstem is termed as the reticular formation.
  • The reticular formation extends from the medulla to the intralaminar nuclei of the thalamus.
  • The main function of the neurons of the reticular formation is to maintain consciousness and motor arousal.

In brief this region controls the following :

1. somatic motor control

2. cardiovascular control

3. sleep

4. consciousness

5. habituation

6. pain modulation

Since the cat is having problems with the sleep-wake cycle, does not respond to the researcher, there is a change in behavior and inability to walk on straight line. This points out to damage in the reticular formation.

Which of the following genotypes indicates a homozygous dominant trait? A. Tt
B. TT
C. tt

Answers

The correct answer is B. The prefix homo means same whereas hetero means different. And when dominant traits are expressed they are written as capital letters.

True/False: The Northern Hemisphere experiences winter when Earth is farthest from the sun.

Answers

when the earth is farthest from the sun, then the either the west or east hemisphere experience winter. The earth revolves around the sun which is the center of the solar system.Hence the answer to this problem must have to be false. There is no difference between the north hemisphere and the south hemisphere in this case,

Answer;

True.

When the northern part of the earth is farthest away from the sun it gets cold and the other side of the earth gets warm / summer

Explanation;

The Earth's orbit is not a perfect circle, but a bit lop-sided. During part of the year, Earth is closer to the sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the sun and summer when it is farthest away.

When it is Summer in the Northern Hemisphere, it is Winter in the Southern Hemisphere, because the Earth is tilted on its axis.

Answer;

True.

When the northern part of the earth is farthest away from the sun it gets cold and the other side of the earth gets warm / summer

Explanation;

The Earth's orbit is not a perfect circle, but a bit lop-sided. During part of the year, Earth is closer to the sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the sun and summer when it is farthest away.

When it is Summer in the Northern Hemisphere, it is Winter in the Southern Hemisphere, because the Earth is tilted on its axis.
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