Respiration and Circulation — BIOLOGY STD 12 Science — Question

What is the supplementary food to silage?

Which kind of immunity is provided by vaccination?

Name and state the law of Mendel, which explains the expression of only one of the parental characters in the F, progeny of a monohybrid cross.

Give an example of an organism that exhibits haplodiploid sex determination system.

Name the enzyme needed for amplification of gene during PCR?

The following statements (i), (ii) and (iii) seem to describe the waterpollinated submerged plants. Which one of these statements is incorrect?

1. The flowers do not produce nectar.
2. The pollen grains have mucilaginous covering.
3. The brightly coloured female flowers have long stalk to reach the surface.

Name the process, the microbes carry out during sewage treatment.

How can we describe osmotic movement of water related to energy?

Give some reasons for infertility among young couples.

Name the Following : Different fish found at an estuary.