If Gastrulation Were Blocked by an Environmental Toxin, Then

question 13

Multiple Choice

If gastrulation were blocked by an environmental toxin, then

• A)cleavage would not occur in the zygote.
• B)embryonic germ layers would not form.
• C)fertilization would be blocked.
• D)the blastula would not be formed.
• E)the blastopore would form above the grey crescent in the animal pole.

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