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How does placenta exchange materials without direct mixing of mother and embryo blood being necessary?
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Answer and explanation
Correct answer: Materials exchange across thin surfaces
Step 1: Placenta creates close contact between mother and embryo. Step 2: Nutrients and gases can pass across thin surfaces. Step 3: So direct blood mixing is not necessary.
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What is the correct answer to this question?
Materials exchange across thin surfaces
Why is this the correct answer?
Step 1: Placenta creates close contact between mother and embryo. Step 2: Nutrients and gases can pass across thin surfaces. Step 3: So direct blood mixing is not necessary.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Reproduction.
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