Reproduction in organisms — BIOLOGY STD 12 Science — Question

Mention the site where syngamy occurs in amphibians and reptiles respectively.

What is average gestation period of elephant, dog and cat?

Define Lactation.

Write a difference between net primary productivity and gross primary productivity.
OR
How is net primary productivity different from gross primary productivity?

Name the mode of reproduction that helps in producing genetically identical offspring.

Mention the chemical change that proinsulin undergoes, to be able to act as mature insulin.

Define trophic level.

What technical term is given to the fish-like reptiles?

Mark the odd one in the following group.
PCR, Widal, rDNA technology, ELISA.

Identify True/ False statements. Correct each false statement to make it true.
Menstrual cycle ceases during pregnancy. (True/ False)