BIOLOGY HIGH SCHOOL

A student investigated how the pressure in a diving pool varied with depth. He filled a balloon with helium and tied it to the end of a long pole. Then he submerged the
balloon to various depths and observed the result. Which one of the following best
describes what happed to the balloon as it went deeper?

(a) The balloon got larger because the pressure of the water around it increased
compared with the pressure inside the balloon.
(b) The balloon got larger because the pressure of the water around it decreased
compared with the pressure inside the balloon.
(c) The balloon got smaller because the pressure of the water around it increased
compared with the pressure inside the balloon.
(d) The balloon got smaller because the pressure of the water around it decreased
compared with the pressure inside the balloon.

Answers

Answer 1
Answer:

The balloon got smaller because the pressure of the water around it increased compared with the pressure inside the balloon. Therefore, the correct answer is (C).

As the student submerged the balloon to various depths, the pressure of the water around the balloon increased, which caused the balloon to get smaller. This is because the pressure inside the balloon remained constant, while the pressure outside increased.

The helium inside the balloon would have been compressed by the increased pressure of the water, causing the balloon to decrease in size. This phenomenon can be explained by Boyle's law, which states that the volume of a gas is inversely proportional to the pressure of its surroundings.

Learn more about Boyle's law, here:

brainly.com/question/30367067

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Answer 2
Answer: Pressure of water increases with depth. Thus, the balloon decreases in volume as it is forced deeper. The correct answer is C).

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A developer wants to turn part of a local woodlot into a new housing development. A vernal pool exists in the part of the woodlot marked for development. How might the developer’s plan affect the salamanders that live in the woodlot? Student Answer:
A The salamanders would have no water to drink.
B The salamanders would have no place to mate and lay their eggs.
The development would have no effect on the salamander population.
C The salamanders would not survive at all if the developer built houses in the woodlot.
I know its B but why would it be B?

Answers

The developer's plan would affect the salamanders that live in the woodlot by taking away their vernal pool, the lack of a vernal pool would mean that the salamanders would have no place to mate and lay their eggs. This would result in a drastic reduction of salamanders in the area. 

A pizza 16 inches in diameter is cut into 8 congruent slices.What is the area of the sector of one piece of pizza?A. 25.12 in.²
B. 31.40 in.²
C. 50.24 in.²
D. 200.96 in.²

Answers

A = pi r^2 
A = 8^2 pi 
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A. 25.12 in^2

In an unfortunate accident, a young man is struck in the leg by a bullet that tears through an artery just above his right knee. The subsequent blood loss leads to a rapid drop in blood pressure. Receptors in the aorta monitor blood pressure and send signals to the vasomotor center of the brain. In this case, the vasomotor center will increase its stimulation of smooth muscle in the blood vessels, which will cause them to constrict. This constriction leads to an increase in blood pressure. What represents the effector in this feedback system?

A) blood vessel diameter
B) receptors in the aorta
C) vasomotor center
D) blood pressure

Answers

Answer:

Answer is D. Blood pressure.

Explanation:

Blood pressure is the pressure of the blood within the arteries, produced by the contraction of the heart muscle.

Answer:

In an unfortunate accident, a young man is struck in the leg by a bullet that tears through an artery just above his right knee. The subsequent blood loss leads to a rapid drop in blood pressure. Receptors in the aorta monitor blood pressure and send signals to the vasomotor center of the brain. In this case, the vasomotor center will increase its stimulation of smooth muscle in the blood vessels, which will cause them to constrict. This constriction leads to an increase in blood pressure.

What represents the effector in this feedback system? receptors in the aorta

Explanation:

The seed plants became dominant during the late ___ when the climate became ___ a. Cretaceo; drier b. Carbonifero; drier c. Carbonifero; wetter d. Cretaceo; wetter e. Cambrian; wetter

Answers

Answer:

D. (Cretaceous, Wetter)

Explanation:

During the late Cretaceous period, seed plants took over. The cause for this was increased rainfall and moisture, which created the ideal environment for plants to develop and seed plants to reproduce.

Bacteria and humans are similar in that they both

Answers

Bacteria and Humans are similar in that they both have the ability to reproduce or multiply, grow, and respond to stimulus. Both humans and bacteria need a certain place or host (in bacteria) in order to procreate. Both also need 'food' in order to grow. Humans take in fresh food, while food of bacteria differs depending on what kind of bacteria it is. For example, necrotizing fasciitis, also known as the flesh-eating bacteria. Both need sources in order to survive. And both possess the smallest functional units called cells.

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Erwin Chargaff
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Friedrich Miescher

Answers

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Answer:

C. Rosland Franklin

Explanation:

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