BIOLOGY HIGH SCHOOL

An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of 30 year old men and women who were at rest were measured. On day one, each person was given a caffeinated soda. On day two, each person was given caffeine-free soda. One hour after drinking the soda, their pulse rates were measured. The participants in the experiment were all the same age and they were all given the same amount of soda. The dependent variable in this experiment is the (HINT: ______ depends on ______).

Answers

Answer 1
Answer:

Final answer:

In the experiment, the dependent variable is the pulse rate of the participants, which is expected to change based on the intake of caffeinated or caffeine-free soda.

Explanation:

In this experiment, the dependent variable is the pulse rate of the participants. This is what the researchers are measuring and observing, and it is expected to change in reaction to the manipulated variables (or independent variables).

In this case, the independent variable is the type of soda consumed: caffeinated and caffeine-free. The hypothesis being tested is that the intake of caffeine (via soda) leads to a higher pulse rate. Therefore, the pulse rate 'depends' on whether or not the soda consumed contained caffeine.

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Answer 2
Answer: The dependent variable in this experiment is the "Pulse rate" depends on "Amount of caffeine in soda"

Hope this helps!

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Which of the following is true of a species that has a chromosome number of 2n = 16? A) The species is diploid with 32 chromosomes per cell.
B) The species has 16 sets of chromosomes per cell.
C) Each cell has eight homologous pairs.
D) During the S phase of the cell cycle there will be 32 separate chromosomes.
E) A gamete from this species has four chromosomes.

Answers

The answer is C) Each cell has eight homologous pairs. 

n is the number of chromosome sets. If a species has a chromosome number of 2n = 16, that means there are 16 chromosomes in diploid cell. A diploid cell contains two sets (2n) of chromosomes. A haploid cell (gamete) contains one set of chromosomes, which is 8 chromosomes.

Final answer:

For a species with a chromosome number of 2n=16, each cell has eight pairs of homologous chromosomes. There are not 32 chromosomes, 16 sets, or four chromosomes in a gamete.

Explanation:

In biology, the chromosome number 2n=16 indicates that the organism is diploid and has 16 total chromosomes, which are organized into 8 homologous pairs. So, the correct answer is option C) Each cell has eight homologous pairs. The number 16 (2n) represents the total number of chromosomes, not how many sets there are, making option B incorrect. One should not interpret this to mean there are 32 chromosomes in total, so option A is also incorrect. During S phase of the cell cycle DNA replication happens, but this doesn't change the number of chromosomes, just the number of DNA molecules, therefore, option D isn't right. Lastly, a gamete (sex cell) from this species would have n=8, or half the number of chromosomes, contradicting option E.

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Which pair of molecules both contain carbon atoms?

Answers

Proteins and fats i believe... Its been awhile.

A 5 kg skateboard moves at 7 m/s². What is the force of the skateboard?
2 m/s
2
12
7 m/s
35 N

Answers

The answer is 35 N.

Force is mass times acceleration: F = m * a

The force is unknown: F=? The unit of force is N (N = kg * m/s²).

But, we know:
mass: m = 5 kg
acceleration: a = 7 m/s²

So, the force is:
F = 5 kg * 7 m/s²
F = 35 kg * m/s²
F = 35 N.

How many diploid and haploid chromosomes does a duck have?

Answers

They have 40 sets of chromosomes

The diagram below shows the stages of mitosis.The original cell, X, contains N number of chromosomes. How many chromosomes does cell Y contain?

Answers

Answer:

1/2N

Explanation:

took the quiz

Answer:

2N

Explanation:

I’m reviewing this with my teacher.

Imagine that a brown horse and a whitehorse cross to produce an offspring whosecoat is made up of some brown hairs and somewhite hairs. Which pattern of dominance is thisan example of?

Answers

Codominance.

Because in the codominance, both the traits of the brown hair and white hair is expressed. So it carries both the traits, regardless of whether it is recessive or dominant.

Hope this helps :)
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