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Marat540 [252]
3 years ago
5

What are constants in an experiment

Biology
1 answer:
Kitty [74]3 years ago
7 0
They are variables that cannot be changed or are purposefully not changed in an experiment.
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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 man with blood type B marries a woman with blood type A . Their first child has blood type 0 . Use a Punnett square to predict
Sauron [17]
The punnett square is attached to this.
The other possibilities are AB, BO, and AO. 
All of them have 25%.

8 0
3 years ago
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How is the arm conected to the human body
serg [7]

Answer: Your upper and lower arms are connected at your elbow by a hinge joint between your humerus and ulna.

Explanation:

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3 years ago
How does a loess affect the environment around it?
WARRIOR [948]

Answer:

Because loess is deposited from the atmosphere it provides an important geologic archive of past atmospheric circulation that can be used to test atmospheric circulation models

Explanation:

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The endosymbiotic theory proposes that eukaryotic cells arose as a result of large cells engulfing smaller, aerobic bacteria. th
lina2011 [118]

The organelle that provides evidence for this theory is the mitochondria and the chloroplast.

<h3>What is the endosymbiotic theory?</h3>

The endosymbiotic theory is the theory which describes how the eukaryotic cells arose from simple prokaryotic cells.

In the endosymbiotic theory states that when two prokaryotic cells with several abilities came together, one engulfed the other and existed in a symbiotic relationship that enabled  the cells to meet their needs for survival an growth.

The mitochondria and the chloroplast provides evidence for the endosymbiotic theory.

In conclusion the endosymbiotic theory describes  how eukaryotic cells arose from simple prokaryotic cells.

Learn more about endosymbiotic theory at: brainly.com/question/1698852

#SPJ1

8 0
2 years ago
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