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3 years ago

Which of the following is an example of a positive feedback?

Biology

2 answers:

iogann1982 [59]3 years ago

6 0

Answer:

C. A tear in the lining of a blood vessel triggers the accumulation of blood platelets, which cause blood to clot.

Explanation:

Positive feedbakc occurs when something happens that triggers B, this B then causes the first thing that originally happened to happen again, and it is a vicious circle that harms the system into unestability. For example the birth circle, when brain releases ocytocin to create contractions and then contractions make the body realese prostaglandis, and this causes the body to realease more oxytocin, which starts the cycle again.

wariber [46]3 years ago

3 0

The answer for this question is C.

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Functional and structural unit of the living organism

telo118 [61]

Answer:

the cell

Explanation:

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3 years ago

A scientist conducts an experiment to test the effects of light on earthworm activity. Which is a variable in this experiment? l

777dan777 [17]

<span>I believe it is light, but this is kind of a confusing question. Technically there is a independent and dependent variable in the question. The variable being manipulated is light, and the earthwork activity depends on the light. </span>

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3 years ago

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Community ecologists study the factors that determine the abundance of different species. The Abundance of three algae species (

Tema [17]

Answer:

Explanation:

Given that:

The abundance of three algal species in Lake A is now represented by the vectors:

[97, 84, 43] and [100, 80, 50]

Now if we look at Lake A, the change occurring in the vector of algae species can be determined as:

a = [100 -97, 80 - 84. 50 - 43]

a = [3, -4, 7]

Thus, the magnitude of that change is:

$|a| = \sqrt{(3)^2 +(-4)^2+(7)^2}$

$|a| = \sqrt{9+16+49}$

$|a| = \sqrt{74}$

$|a| =8.6 \ mg/mL$

The abundance of three algal species in Lake B is now represented by the vectors:

[25, 59, 22] and [20, 63, 15]

At Lake B, the change occurring in the vector of algae species can be determined as:

b = [20 -23, 63 - 59. 15 - 22]

b = [-3, -4, -7]

Thus, the magnitude of that change is:

$|b| = \sqrt{(-3)^2 +(4)^2+(-7)^2}$

$|b| = \sqrt{9+16+49}$

$|b| = \sqrt{74}$

$|b| =8.6 \ mg/mL$

Hence, for both Lake A and B, the magnitude of change is the same.

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3 years ago

On Earth is born Origins Nova

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Mars is just a fraction the size of the Earth, so it cooled more rapidly. And as it cooled, its molten iron core hardened. As a result, Mars stopped generating its magnetic shield. And, according to one theory, this left its atmosphere to be scoured away by the solar wind.

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3 years ago

What is the difference between the IDENTITY of the protein and the CONCENTRATION of the protein? For this lab, what is the ident

guajiro [1.7K]

Answer:

The identity of a protein has relation with its amino acid sequence. This sequence is determined by the nucleotide sequence of the DNA of the gene transcribed to RNA and translated into amino acids. Protein identity determines its structure and function. The concentration of a protein refers to the percentage of protein that exists in a given solution. One way to quantify the concentration is with a spectrophotometer calculating the absorbance of the protein.

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3 years ago