Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

How do microbes reduce the environmental degradation caused by chemicals?

Explain the relevance of "Totipotency" and "Somaclones" in raising healthy banana plants from virus infected banana plants.

Why are papaya and date palm plants said to be dioecious whereas cucurbits and coconut palms monoecious, in spite of all of them bearing unisexual flowers?

(i) Write the complete name of IUDs.
(ii) IUDs secreting the hormone are said to be best contraceptive to keep space between children. Why?

The Human Genome Project (HGP) was a grand scheme which was started in 1990 for some important objectives.
(a) List any four major objectives of HGP.
(b) Write the name of any one common animal model other than humans which was sequenced over time.

What is entomophily? Describe the features of entomophilous flowers.

Why does hnRNA need to undergo splicing? Where does splicing occur in the cell?

Prey species have evolved various defenses to lessen the impact of predation. Explain with example.

Give difference: RNA and DNA

A liverwort plant is unable to complete its life-cycle in a dry environment. State two reasons.