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mart [117]
2 years ago
13

Which of the following is *true* of the placenta? Question 18 options: 1) It fully develops six months after birth. 2) It forms

during the seventh month of prenatal development. 3) It is the fluid-filled sac that houses the developing embryo and fetus. 4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.
Biology
1 answer:
anastassius [24]2 years ago
6 0

Answer:

4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.

Explanation:

The placenta is an organ present in all mammals. She is confirmed between the 6th and 8th week of pregnancy and has as main function the exchange of substances between the mother and the fetus. Among these substances are nutrients, gases and even secretions. The placenta also has the function of fighting infections and promoting immunity to the fetus, in addition, it can act as the lung, the intestine and the liver, while the fetus does not develop its organs.

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Pigmented eyes (P) are dominant to non-pigmented (p), and dimpled chins (D) are dominant to Non-dimpled chins (d). A pigment-eye
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Answer:

PpDD and PpDd

Explanation:

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<em>Hence, the genotype of the father is now limited to </em><em>PpDD</em> <em>and </em><em>PpDd</em>.

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When the brain is unoccupied, an fmri indicates that blood continues to flow via a web of brain regions called the?
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Default network


When the brain is unoccupied, an fMRI indicates that blood continues to flow via a web of brain regions called the default network.

The default network is a web of brain regions that have activity that corresponds greatly with each other and different from other networks within the brain. The default network is active when an individual's attention is not concentrated on the external environment and it is measured with the functional magnetic resonance imaging technique (fMRI).



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2 years ago
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