Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

What is radial and tangential translocation?

What is the expected rise in the global temperature by the year 2100?

Name the band of nerve fibres that connect cerebrum, cerebellum and spinal cord.

Name the initial cells of the male and female gametophytes.

Name the largest cell of the embryo sac.

Rearrange the following events of sexual reproduction in the sequence in which they occur in a flowering plant: embryogenesis, fertilisation, gametogenesis, pollination.

Name two freshwater fishes that are used as food.

In the figure given below one male and one female gamete of an organism is depicted. Which type of gametes are they?

Tiger and the deer.

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: GM foods are facing widespread resistance by the people.
Reason: GM foods have mutated genes which cause infections and allergies.