Reproductive Health — BIOLOGY STD 12 Science — Question

All animals are called consumers.

Given below is a figure of a biogas plant.

1. Identify A and justify its floating nature.
2. Identify the products B and C and discuss their significance.

Study a part of the life cycle of malarial parasite given below. Answer the questions that follow:

1. Mention the roles of 'A' in the life cycle of the malarial parasite.
2. Name the event 'C' and the organ where this event occurs.
3. Identify the organ 'B' and name the cells being released from it.

Define ‘genomics’. Give any ‘two’ applications of it.

Give reasons: Placenta serves as the nutritive, respiratory and excretory organ of the embryo.

Observe the diagram given below and answer the questions that follows.

1. What does the given diagram show?
2. Name any two plants (other than the one shown in fig.) which reproduce by the same method?
3. What are these plant parts referred to?

Give examples of coordinated regulation or expression, of several sets of genes.

Haemophilia is a sex linked recessive disorder of humans. The pedigree chart given below shows the inheritance of haemophilia in one family. Study the pattern of inheritance and answer the questions given.

1. Give all the possible genotype of the members 4, 5 and 6 in the pedigree chart.
2. A blood test shows that the individual 14 is a carrier of haemophilia. The member numbered 15 has recently married the member numbered 14. What is the probability that their first child will be a haemophilic male?

Write chemical reactions to represent Methanogenesis.

The biodiversity increases when one moves from the pioneer to the climax stage. What could be the explanation?