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tatyana61 [14]
3 years ago
7

What body systems are used to run the 100-meter dash?​

Biology
1 answer:
Alisiya [41]3 years ago
5 0

The muscular system

The circulatory system

The digestive system

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b. In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did t
saveliy_v [14]

Answer:

The initial amount, 1.3 million = 1,300,000 is the 100%.

now, 640,000 is a given percentage (lower than 100%) of that.

How we can find it?

suppose that 640,000 represents an x%.

Then we have that the quotient between the actual quantities and the percentages must be the same

(640,000/1,300,000) = x%/100%

x% = (640,000/1,300,000)*100% = 49.23%

Then the percentage declined is:

100% - 49.23% = 50.77%

The other question can not be answered with the given information.

4 0
4 years ago
On the first day after arriving in Miami for spring break vacation, Matt plays out in the sun for six hours. Later that night he
galina1969 [7]

Answer:

Miami is is kanada

Explanation:

its c

5 0
3 years ago
What term identifies the light areas of the moon?
elena55 [62]
You're answer would be B) Terrae.

Hope this helps,
♥<em>A.W.E.<u>S.W.A.N.</u></em>♥
3 0
3 years ago
Read 2 more answers
The cholera toxin, an AB exotoxin, attaches an ADP-ribose group to the host's stimulatory G factor (Gs). The normal function of
SCORPION-xisa [38]
<h2>b) option is correct </h2>

Explanation:

  • Some bacterial toxins cause disease by  altering the activity of G protein, cholera toxin is one of them
  • Cholera toxin catalyse ADP ribosylation of Gs and blocks GTPase activity thus Gs GTP become permanently active
  • Constitutive activation of Gs protein continuously induce adenylyl cyclase, cytosolic cAMP level rises that leads to activation of protein kinase A (pKA)
  • Activated pKA catalyse phosphorylation of two transmembrane proteins of intestinal epithelial cells:
  • CFTR cause excessive outflow of Cl- ion and Na+ H+ exchange cause efflux of Na+ ion, both enters in gut and form Na+ Cl-
  • Na+Cl- leads to outflow of water from the gut, resulting in diarrhea and dehydration and this condition may cause death of organisms due to loss of water and ions  
6 0
3 years ago
What is the characteristic of the gastrula stage of embryo development?Select one of the options below as your answer: A. Format
salantis [7]

<span>The answer is letter B. The formation of the three geminal layers and the primitive gut. The formation of gastrula starts when the cells starts folding in blastula slowly forming into a blastopore, that results to a double layer cup cell, forming the geminal layers and the primitive gut </span>

7 0
3 years ago
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