The ratio of the radial of the first three Bohr orbit in H atom is

#Question id: 5602

#XL - T Zoology

The process of synthesis of yolk by the oocyte is termed

#Question id: 5603

#XL - T Zoology

During capacitation, the pathway is modulated by the removal of cholesterol from the sperm cell membrane, which allows 

#Question id: 5604

#XL - T Zoology

Upon secretion of wnt, When Wnt attaches to the Frizzled receptor on a responding cell, the cell secretes Notum, cleaves off Wnt’s attached lipids. This process is called as:

#Question id: 5605

#XL - T Zoology

Double fertilization is a unique feature of flowering plants. In this process, one sperm unites with the egg to yield a zygote. The second sperm unites with the polar nuclei to initiate the formation of the

#Question id: 5651

#XL - R Botany

Growth and development of plant parts involves ________.

I) cell division to produce new cells

II) enlargement and elongation of cells

III) specialization of cells into tissues

#Question id: 5685

#XL - R Botany

Human sperm are allowed to fertilize ova having non- functional ovastacin. The following possibilities may be of significance in the fusion of these gametes:

A.        The sperms will not fertilize ova.

B.        The sperms will bind and penetrate the zona pellucida but will not be able to fuse with ovum membrane.

C.        ZP2 will not be clipped by cortical granule protease.

D.        CD9 protein of egg membrane microvilli will not be able to interact sperm membrane proteins in the absence of ovastacin.

E.         Polyspermy may occur frequently.

Which combination of statements represent the outcome of the above event?