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Natasha_Volkova [10]
3 years ago
13

In humans, the placenta is essential to the embryo for

Biology
1 answer:
lianna [129]3 years ago
4 0

Question options:

(1)nutrition, excretion, and reproduction

(2)respiration, nutrition, and excretion

(3)movement, reproduction, and nutrition

(4)coordination, movement, and growth

Answer:

(2)respiration, nutrition, and excretion

Explanation:

The placenta between the mother and the fetus has three main function.

- Attach the fetus to the uterine wall.

- Provide nutrients to the fetus.

- Allow the fetus to transfer waste products to the mother's blood.

The placenta refers to an organ in the uterus of mother that is responsible for nourishing and maintaining the fetus through the umbilical cord. The placenta also has many other functions but primarily it plays critical roles in the nutrition, respiration and excretion of the fetus. Its other functions include: production of hormones, production of immunity for the fetus for prevention from infections, etc. 

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As given in the graph, mutation in this gene causes a decline in the production of glucose as it obstruct the process of photosynthesis.

<h3>What is psaB gene?</h3>

P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1, and FX, are bound by PsaA and PsaB.

As given in the graph, mutation in this gene causes a decline in the production of glucose as it obstruct the process of photosynthesis.

Thus, the plant with the mutated psaB gene was dying.

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