Organisms and Populations — BIOLOGY STD 12 Science — Question

State how does ex-situ conservation help in protecting biodiversity.

Mention the pollinating agent of an inflorescence of small dull-coloured flowers with well exposed stamens and large feathery stigmas. Give any one characteristic of pollen grains produced by such flowers.

Differentiate between male and female heterogamety.

What is sporozoite?

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

Name a bioactive molecule, its source organism and the purpose for which it is given to organ transplant patients.

How depletion of ozone layer affects living organisms ?

In an association of two animal species, one is a termite which feeds on wood and the other is a protozoan Trichonympha present in the gut of the termite. What type of association they establish?

In medical termination of pregnancy strict conditions are to be followed. Mention few.

Sketch and label hair pin model of t-RNA.