The organization phases of development are regulated by

A. transcription factors.
B. morphogens.
C. segmentation genes.
D. morphogens and transcription factors only.
E. morphogens, transcription factors, and segmentation genes.


E. morphogens, transcription factors, and segmentation genes.

Biology & Microbiology

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The kinase central to second messenger signalling based cAMP is

A) protein kinase A. B) ATPase. C) Avastin kinase. D) phosphorylase A. E) RNase PH.

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In which population size did the allelic frequencies change more quickly?

a. 100 b. 1000

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Which mode of transit has the greatest energy consumption?

A. Sedan B. SUV C. Bus during peak hours D. Bus during off-peak hours E. Pickup truck

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What external layers must a sperm penetrate in order to fertilize the egg?

What will be an ideal response?

Biology & Microbiology