Human Health and Disease — BIOLOGY STD 12 Science — Question

Name the technique that is used to alter the chemistry of genetic material (DNA, RNA) to obtain desired result.

What is the advantage of selecting dioecious plants for carrying out artificial hybridisation or breeding experiments?

What is polar vortex?

Name the first plasmid used as vector.

Answer the following questions:
Over the years, it has been observed that some of the lakes are disappearing due to urbanisation. In absence of human interference, depict by making a flow chart, how do the successional series progress from hydric to mesic condition.

How many germ pores are there in the pollen grains of monocots and dicots?

Name the microbe which is known as brewer's yeast. Write its one use.

Mention the useful as well as the harmful drug obtained from the latex of Poppy plant.

Name the gas which holds up ultraviolet rays.

Provide an instance where the population size of a species can be estimated indirectly, without actually counting them or seeing them.