Which describes a difference between a positive and negative feedback loop?

1 answer:

4 0

Answer: b. the output of a system keeps conditions within the body absolutely constant only in a negative feedback loop.

Explanation:

In the negative feedback loop, the feedback reduces the excessive response of the stimulus for example regulation of body temperature, and control of blood glucose level. In the positive feedback loop, the response of a stimulus is intensified. Example, positive feedback is the childbirth and blood clotting. According to the negative feedback loop the output of the system keeps the internal body environment constant with respect to the changes in the external environment hence, maintains the homeostasis.

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First-division nondisjunction will only yield gametes with an extra chromosome, whereas second-division nondisjunction will only

statuscvo [17]

False

Explanation:

During the meiosis, the cell is dividing two times and chromosomes are getting replicated. In this process, there can be errors. One of those errors is called nondisjunction.

As a result of the meiosis one, the cell gets divided into two cells and each will carry 23 chromosomes each. At this stage, These chromosomes are connected in the form of sister chromatids. During the meiosis two, these sister chromatids will pull apart and form four cells. Each one will be haploid cells. In meiosis one, chromosomes will undergo crossing over so this separation of chromosomes in the second meiosis is know as disjunction. However, in this process of separation, the chromosomes do not need to get distributed correctly. The errors that happened in this process are known as nondisjunction.

In humans, meiosis will happen and form sperms or eggs( gametes) which are haploid cells and later they combined to form a zygote which is the diploid cell.

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3 years ago

A scientist places 25 mg of bacteria in a culture for an experiment and he finds that the mass of the bacteria triples every day

Marizza181 [45]

Answer:

300%

Explanation:

The mass of the bacterial culture is triples everyday, meaning that after one day the culture will have 300% of the mass as the culture one day prior.

8 0

3 years ago

Which one is the correct Answer???

Rom4ik [11]

Answer:

I'm pretty sure the answer is 4.

Explanation:

1 and 2 are definitely homeostasis because it is a way to keep your body balanced how it needs to be and 3 would be a natural reaction that your body would make to prevent further pain, but 4 would be a personal choice that is made by the person who stays up.

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3 years ago

The dense structure which contains proteins and RNA, found inside the nucleus,*

mart [117]

Answer:

D Ribosome

Explanation:

8 0

3 years ago

Read 2 more answers

Concentration: <br> the amount of a substance within a _______ of another <br> substance

tigry1 [53]

Answer:

Volume

Explanation:

In chemistry, the CONCENTRATION of a solution is the amount of a substance present within a volume of another substance. In other words, the concentration refers to the amount of a solute dissolved in a particular volume of a solvent to make a solution.

Concentration can be expressed in mass per volume i.e. g/cm³ or mol per volume i.e. mol/L or mol/dm³ etc. The amount of a substance is measured in Mass or mole, while the volume of a substance in Litres (L).

4 0

3 years ago