Biodiversity and Conservation — BIOLOGY STD 12 Science — Question

A boy of ten years had chickenpox. He is not expected to have the same disease for the rest of his life. Mention how it is possible.

Mark the odd one in give each of the following groups.
Human hands, Wings of butterfly, Wings of bat, Wings of birds.

Name the functions of the following: Sperm tail

The Amazon rain forest is referred to as the lungs of the planet'. Mention any one human activity which causes loss of biodiversity in this region.

Write the names of the following:

1. A 15 mya primate that was ape-like.
2. A 2 mya primate that lived in East African grasslands.

How long does the replication of human DNA take place?

Write the two components of the first artificial recombinant DNA molecule constructed by Cohen and Boyer.

Name the negatively charged and positively charged components of a nucleosome.

OR

Name the positively charged protein around which the negatively charged DNA wrapped.

A mother of one year old daughter wanted to space her second child. TO SIO boni Her doctor suggested CuT. Explain its contraceptive actions.

Bt toxin protein exists in which form inside bacterium?