Following statements are regarding to the early development in sea urchin.

A. most cells of the 16-cell embryo, the large micromeres are autonomously specified.

B. large micromeres inherit maternal determinants that were deposited at the vegetal pole of the egg; these become incorporated into the large micromeres at the fourth cleavage.

C. The conditionally specified large micromeres are now able to produce paracrine and juxtacrine factors that autonomously specify the fates of their neighbors.

D. Large micromeres become skeletogenic mesenchyme cells that will leave the blastula epithelium, enter the blastocoel, migrate to particular positions along the blastocoel wall, and then differentiate into the larval skeleton.

Which of the following statement is false?

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#Question id: 10812

#Unit 6. System Physiology – Plant

P-protein occur only in certain legumes and are encoded by members of the gene family known as;

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#Question id: 5814

#Unit 8. Inheritance Biology

A bacterial cell experiences a mutation as a result of exposure to nitrogen mustard and then divides several times to produce a total of eight cells. How many of the resulting cells would you expect to contain the mutation?

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#Question id: 32376

#Unit 2. Cellular Organization

Phalloidin isolated from Amanita phalloides, binds to:

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#Question id: 4621

#Unit 11. Evolution and Behavior

DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is that

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#Question id: 20300

#Unit 7. System Physiology – Animal

One of the metabolic effect of cortisol is: