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Elena L [17]
3 years ago
7

True or false: male and female embryos look the same anatomically at five weeks of pregnancy.

Biology
1 answer:
Marizza181 [45]3 years ago
3 0

The statement is true. The male and female embryos anatomically look same at five weeks of pregnancy.

In the 4th week of pregnancy the blastocysts gets implanted in the walls of uterus and develops into the placenta and then becomes an embryo. The embryo is considered starting from the point when the amniotic sac develops which is at the starting of the 5th week of pregnancy. By the 12th week of pregnancy the organs are developed such as arms and legs but the brain and spinal cord keeps developing throughout the pregnancy.

The second trimester begins at the 13th week of the pregnancy and by the 14th week the gender can be identified. So the male and female embryos are anatomically same at 5th week of the pregnancy.

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True or False; Diversity of life has decreased over Earth's history.
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true

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3 years ago
Please help hurry!
Svet_ta [14]

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6 0
2 years ago
Which molecule prevents a muscle contraction from occurring when the muscle is at rest?
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Troponin-tropomyosin molecules prevents a muscle contraction from occurring when the muscle is at rest.

<h3>What is muscle contraction?</h3>

The activation of tension-producing regions within muscle cells results in muscular contraction. Because muscle tension can be created without changes in muscle length, such as when holding something heavy in the same position, muscle contraction does not always imply muscle shortening in physiology. Muscle relaxation, or the return of the muscular fibers to their low tension-generating state, occurs after a muscle contraction has finished.

Both length and tension can be used to characterize muscle contractions. If the muscle tension varies but the muscle length doesn't, the muscle contraction is said to be isometric. A muscle contraction is isotonic, however, if the tension in the muscle remains constant during the contraction.

To learn more about muscle contraction with the help of given link:

brainly.com/question/10115123

#SPJ4

5 0
1 year ago
Ill mark brainliest!
Yakvenalex [24]
The answer is A I believe
6 0
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Read 2 more answers
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