Organisms and Populations — BIOLOGY STD 12 Science — Question

How is the action of exonuclease different from that of endonuclease?

Occurrence of more than one embryo in a seed, is known as_______.

Mention the role of restriction enzymes in recombinant DNA technology.

In a pond, there were 200 frogs. 40 more were born in a year. Calculate the birth rate of the population of frogs in the pond.

Name two organisms (one plant and one animal) which breed only once in their life time.

At which ends do 'capping' and 'tailing' of hnRNA occur, respectively?

How are tobacco plants benefitted when nematode specific genes are introduced into them using certain vectors? Name the vector used.

Name the two intermediate hosts which the human liver fluke depends on to complete its life cycle so as to facilitate parasitization of its primary host.

Can you recall meiosis and indicate at what stage a recombinant DNA is made?

Define migration. Mention the types of migration.