Organisms and Populations — BIOLOGY STD 12 Science — Question

Name any two opiate narcotics.

Observe the pedigree chart and answer the following questions:

Identify whether the trait is sex–linked or autosomal.

Name the contraceptive recently developed at CDRI, Lucknow.

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: Biopatents are awarded for biological entities and all products derived from them.
Reason: Patent on use of turmeric in wound healing was cancelled in 2008.

Name the ancestor of modern amphibian.

Mention the difference between spermiogenesis and spermiation.

What are cleistogamous flowers. Give example also.

Which one is tailed with adenylate residue, between 3' end and 5' end of hnRNA?

What is a monohybrid cross?

Write a difference between net primary productivity and gross primary productivity.

OR

How is net primary productivity different from gross primary productivity?