In the formation of vertebrate eye, optic vesicle and head ectoderm are-

#Question id: 4955

#SCPH28 | Zoology

If relatively small carbonaceous chondrites from space were a significant source of Earthʹs original amino acids, then which two of these would have been most important in permitting their organic materials to survive impact with Earth?

I. Carbonaceous chondrites must contain no D-amino acids.

II. Earthʹs early atmosphere must have had little free oxygen.

III. The chondrites must have arrived on Earth before 4.2 billion years ago.

IV. Earthʹs early atmosphere must have been dense enough to dramatically slow the chondrites before they impacted.

V. The chondrites must have impacted land, rather than a large body of water.

#Question id: 2349

#SCPH28 | Zoology

A liver cell would detect the presence of insulin by

#Question id: 22940

#SCPH06 I Botany

#Question id: 5070

#SCPH28 | Zoology

During juxtacrine pathway, notch protein is activated by the neighbouring cells which expresses:

#Question id: 10553

#SCPH06 I Botany

Cell walls allow plant cells to build up large internal hydrostatic pressures called