Ecosystems — BIOLOGY STD 12 Science — Question

Name the scientist who also came to similar conclusion as Darwin. Where did he work?

How are different varieties of pollen grains stored for long period of time in pollen banks?

OR

Mention any one application of a pollen bank.

Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: PCR is routinely used for early diagnosis of HIV in suspected AIDS patients.
Reason: PCR can detect low amounts of DNA.

Who won the Nobel Prize for the discovery of Penicillin?

Which theory is also referred as chemical theory or naturalistic theory?

State True/ False with explanation.
Creating awareness about sex related aspects is an effective method to improve reproductive health of the people. (True/ False)

Mention the contribution of genetic maps in human genome project.

Define population density.

Write the Mendelian dihybrid ratio.

Name the interspecific interaction in which one is detrimental while the other is neutral.