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?

TLS Online TPP Program

#Question id: 7705

#Unit 9. Diversity of Life Forms

 Based on this tree, which statement is correct?

TLS Online TPP Program

#Question id: 10676

#Unit 10. Ecological Principles

For a pair of interacting species, increased specialization and decreased niche breadth in both species would result in

TLS Online TPP Program

#Question id: 17811

#Unit 7. System Physiology – Animal

Distress can lead to ______.

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#Question id: 12138

#Unit 10. Ecological Principles

The oak tree pathogen Phytophthora ramorum has migrated 650 km in ten years. West Nile virus spread from New York State to 46 others states in five years. The difference in the rate of spread is probably related to

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#Question id: 10382

#Unit 6. System Physiology – Plant

Ureides are