BIOLOGY HIGH SCHOOL

Which of the following is a nitrogenous base?A) ribose
B) guanine
C) enzyme
D) cysteine

Answers

Answer 1

Answer:

Answer:

B) Guanine

Explanation:

The nitrogenous bases are guanine, adenine, cytosine, thymine, and uracil (for RNA).

Answer 2

Answer:

Answer:

Explanation:

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Anthony is studying how quickly children tire based on the amount of sugar they ingest. He splits a group of 20 children into 2 groups. One group is given sugar and the other is not. Anthony asks the children to start playing at a playground at the same time, and to stop when they tire, measuring the time each child stops playing. He finds that the children who did not ingest sugar played 2 minutes longer than those who did ingest sugar. Anthony rerandomizes the data, calculates the difference between the means, and creates the dot plot shown below. Based on the data, can Anthony conclude the difference is significant?A: Yes Anthony can conclude the difference is significant because a 2-minute difference is not likely to happen by chance B: No, Anthony cannot conclude the difference is significant because a 2-minute difference is likely to happen by chance. C: Yes, Anthony can conclude the difference is significant because 0.25 is the difference in means that occurs most often. D: No, Anthony cannot conclude the difference is significant because 0.25 is the difference in means that occurs most often.
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What is the primary reason the signaling molecule is not received by every cell nucleus? Option 1: Cell nuclei have varying sizes. Option 2: The signaling molecule is too large. Option 3: Not all cells have receptors for the molecule. Option 4: The molecule is rapidly degraded.

Answers

Answer:

3. Not all cells have receptors for the molecule.

The main reason a signaling molecule is not receive by every cell nucleus is that not all cells have receptors for that particular molecule. Cells have specific receptors on their surface to recognize and respond to their corresponding signaling molecule. Cells that lack the specific receptors for a given signaling molecule will not respond to it, regardless of the size of the cell nuclei or other factors such as the stability of the molecule itself.

Which of these buildings is most likely to have indoor air pollution

Answers

The building from the list provided with the highest likelihood of air pollution is a tightly sealed house with an unvented water heater. The school with leaks will let air exchange happen so that isn't it, and having a carbon monoxide detector only reports existing air pollution it doesn't prevent air pollution, it could have issues but we don't know. The tightly sealed house with the unvented water heater is a near sure thing.

when heater is on for long time without having ventilation then carbondioxide will be converted into carbon monoxide and causes air pollution.

So according to above explanation,

C. A tightly sealed house with an unvented water heater, is the correct answer.

What was a primary reason for the revived popularity of the Ku Klux Klan?

Answers

It was an increase in nativist feelings in the nation.

it was an increase in nativist filling in the nation

happy t0 help

What is biodiversity an indicator of? A. ecosystem health B. ecosystem growth C. ecosystem decline D. ecosystem location

Answers

Your answer is A, hope it helps!

Which should you do in the event of a catastrophic hurricane?Board up all windows and doors.
Hide in the basement.
Take shelter on the second floor.
Drive out of town on a main thoroughfare.

Answers

Answer:

I have done the test and got the right answer here, and edited my answer so it's now correct. Sorry I had put the wrong answer before! But here is the right answer!

Explanation:

Which of the following statements is true?A.
Fossils are frequently found in metamorphic rock.

B.
Igneous rocks form from the cooling and crystallization of magma.

C.
Extrusive igneous rocks, found in the Earth's lithosphere, are not subject to weathering.

D.
Sedimentary rocks are formed as a direct result of chemical weathering.