Species-specific sperm attraction has been documented in numerous species. In echinoderms, sperm are attracted toward eggs of their species by chemotaxis. Following statements are about chemoattraction-

A. In this process Sperm follows a gradient of a chemical secreted by the egg.

B. These oocytes control only the type of sperm they attract, but not the time at which they attract them.

C. Releasing the chemotactic factor only when the sea urchin egg has completed all of its meiotic divisions .

D. Releasing the chemotactic factor only when the sea urchin egg is in second metaphase of its meiotic division.

E. The mechanisms of chemotaxis differ among species and chemotactic molecules are different even in closely related species.

Which of the following statement are incorrect about this process?

TLS Online TPP Program

#Question id: 638

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following class of enzymes with them

Enzyme	Class of enzyme
A. Hexokinase	1
B. Phosphoglucoisomerase	2
C. Glyceraldehyde 3-phosphate dehydrogenase	3
D. Phosphoglycerate mutase	4
E. Enolase	5
F. Aldolase

TLS Online TPP Program

#Question id: 28536

#Unit 5. Developmental Biology

which of the following gene that positively regulate WUS (meristem-promoting gene)?

TLS Online TPP Program

#Question id: 5690

#Unit 8. Inheritance Biology

Species I is diploid (2n =4) with chromosomes AABB; related species II is diploid (2n = 6) with chromosomes MMNNOO .Which of the following chromosome  in allotriploid individuals?

TLS Online TPP Program

#Question id: 5457

#Unit 8. Inheritance Biology

If the environmental variance (VE) increases and all other variance components remain the same, what will the effect be?

TLS Online TPP Program

#Question id: 4231

#Unit 3. Fundamental Processes

The genetic code is redundant. What is meant by this statement?