Respiration and Circulation — BIOLOGY STD 12 Science — Question

What are the different stages found in the life cycle of silkworm?

Name any two assisted reproductive technologies that help infertile couples to have children.

Enzyme involved in formation of double helix in daughter DNA molecules.

How is copy number of the plasmid vector related to yield of recombinant protein?

Name an example of a rod-shaped virus.

A cross was carried out between two pea plants showing the contrasting traits of height of the plant. The result of the cross showed 50% of parental characters. Name the type of cross.

Draw a diagram of a matured microspore of an angiosperm. Label its cellular components only.

Which nuclei fuse to give rise to endosperm?

What is a nucleoid?

What will be marriageable age for boy and girl as per the Indian law?