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?

TLS Online TPP Program

#Question id: 15859

#Unit 12. Applied Biology

The continuously growing callus cultures were established from___

TLS Online TPP Program

#Question id: 11607

#Unit 6. System Physiology – Plant

How the active gibberellin GA1 is inactived by?

a)  By hydroxylation remove GA20 from the biosynthetic pathway by converting it to GA1

b) conversion to GA8 by a hydroxylation on carbon 2

c) By hydroxylation remove GA20 from the biosynthetic pathway by converting it to GA29

TLS Online TPP Program

#Question id: 10289

#Unit 6. System Physiology – Plant

If C6 of glucose is radiolabelled, which carbon of Dihydroxyacetone phosphate and glyceraldehyde 3-phosphate  is radiolabelled?

TLS Online TPP Program

#Question id: 15740

#Unit 5. Developmental Biology

The position of the testis-determining gene was narrowed down to a 35,000-base-pair region of the:

TLS Online TPP Program

#Question id: 18948

#Unit 13. Methods in Biology

The pore size of the gel depends on the which following two factors