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SVETLANKA909090 [29]
2 years ago
13

The hypothesis that all species are descended from common ancestors was proposed by

Biology
1 answer:
MrRissso [65]2 years ago
6 0
The answer is Charles Darwin. He was the first to theorize evolution from a common ancestor.
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This diagram shows the menstrual cycle.
LiRa [457]

Answer:

According to the hormone diagram of the menstrual cycle, the woman is not pregnant due to the behavior of progesterone and estrogens, whose levels do not increase, in addition to the absence of human chorionic gonadotropin.

Explanation:

The graph shows the behavior of hormones during a woman's menstrual cycle in the absence of pregnancy.

During a woman's normal cycle, estrogen, luteinizing hormone (LH) and follicle stimulating hormone (FSH) tend to increase prior to ovulation, reach their peak values at ovulation, and then decline, as shown in the graph. Progesterone, on the other hand, increases after ovulation and decreases if the woman does not become pregnant.

In the case of a pregnant woman:

  • <u>Estrogens</u> continue to increase after ovulation, produced by the ovaries and placenta.
  • <u>Progesterone</u> also increases its levels, as it is a hormone produced by the ovaries and placenta.
  • <u>Hormone human chorionic gonadotropin</u> (HCG) appears and increases during pregnancy, due to the secretory activity of the placenta.

<em><u>The diagram represents the normal cycle of a woman who is not pregnant</u></em>.

4 0
3 years ago
A "mystery molecule" was isolated in a laboratory and scientists found that the molecule readily crossed artificial membranes. W
Arlecino [84]

<u>Answer</u>:       D. calcium chloride

<em>Calcium chloride molecules can be ruled out as the mystery molecule</em>

<u>Explanation:</u>

<em>Artificial membranes are also called as the synthetic membranes.</em> It is created synthetically for the <em>special separation purpose in the laboratory. </em>

It is used to separate large molecules like <em>solid particles and big biological molecules like protein, DNA. </em>

They are produced from organic materials. <em>Calcium chloride contains the chloride ion and calcium ion,</em> as the chloride ion easily passes the artificial membrane so we can term <em>calcium chloride as the mystery membrane that passes the artificial membrane easily.</em>

5 0
2 years ago
Whats used faster than theyre replaced
Gwar [14]
White Blood cells Because they are produced in your body and they are constantly used more than they are replaced
4 0
3 years ago
Which process is an important part of chemical weathering through oxidation?
Aliun [14]

Answer:

The process that is an important part of chemical weathering through oxidation is oxygen giving up electrons to other elements

5 0
3 years ago
Need help ASAP PLZ!
tresset_1 [31]

Answer:

3 because the muscle cells is produced

6 0
2 years ago
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