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In mammals, The placenta is essential to the embryo for:

A. Nutrition, reproduction, and growth
B. Nutrition, respiration, and excretion
C. Locomotion, respiration, and excretion
D. Nutrition, reproduction, and excretion

2 Answers

6 votes
B. Nutrition, respiration, and excretion
User Selmar
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2 votes

Answer:

Nutrition, Respiration, Excretion

User Asgoth
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