Hook formation and maintenance result from ethylene-induced asymmetric growth,  indicating that phytochrome is the photoreceptor involved in this process

a) Red light induces hook folding, and far-red light reverses the effect of red

b) close interaction between phytochrome and ethylene controls hook opening

c) Red light inhibits ethylene formation, promoting growth on the inner side, thereby causing the hook to open

Which of the following combination from the given statements is correct?

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#Question id: 28391

#Unit 5. Developmental Biology

The leading edge of invaginating cells crawls up onto the blastocoel roof and formed dorsal mesoderm, this process is done by______

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#Question id: 28392

#Unit 5. Developmental Biology

Convergence and extension occurred in dorsal mesodermal cell at the time of axis elongation such as____

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#Question id: 28393

#Unit 5. Developmental Biology

The mechanism for this “bottom-up” specification of the frog embryo resides in a set of mRNAs that are tethered to the vegetal cortex. This includes the mRNA such as___

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#Question id: 28394

#Unit 5. Developmental Biology

the mRNA for the transcription factor VegT, which becomes apportioned to the vegetal cells during cleavage. VegT is critical in generating which of the following lineages?

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#Question id: 28395

#Unit 5. Developmental Biology

One of the genes activated by VegT protein encodes the Sox17 transcription factor , these sox17 transcription factor is critical for which functions?

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#Question id: 28396

#Unit 5. Developmental Biology

VegT is critical in generating the germ cells, two genes activated by VegT protein that encodes the transcriptional factor as well as paracrine factors that instruct the cell layers to become their fate. which of the following statements is incorrect?

a) Sox17 paracrine factor that specify cells to be endoderm

b) Nodal transcription factors that instruct the cell layers above them to become mesoderm

c) Nodal paracrine factors that instruct the cell layers above them to become mesoderm

d) Sox17 transcription factor that specify cells to be endoderm