Strategies for Enhancement in Food Reproduction — BIOLOGY STD 12 Science — Question

'in-situ' conservation can help endangered/threatened species. Justify the statement.

How can we improve the success rate of fertilisation during artificial insemination in animal husbandry programmes?

Write a note on cultural and religious importance of biodiversity Which type of conservation measures, in situ or ex-situ will help the larger number species to survive? Explain.

AtRNA is charged with the amino acid methionine.

1. Name the process involved in attachment.
2. Point out the mRNA codon and anticodon on tRNA for this amino acid.
3. Name the enzyme responsible for this attachment.

A burglar in a huff forgot to wipe off his blood-stains from the place of crime where he was involved in a theft and fight. Name the technique which can help in identifying the burglar from the blood-stains. Describe the technique.

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.

During an excursion to a botanical garden, the teacher shows an old tree, which was on the verge of extinction. As soon as the teacher advanced with the students, some enthusiastic students climbed up the tree and started cutting the branches, collecting its leaves as precious collection. Rajesh instead took photographs of the tree from various angles. The boys mocked at Rajesh while the teacher appreciated him.

1. How can biodiversity be conserved?
2. What international initiatives were taken to conserve biodiversity?
3. What values did Rajesh possess?

How are viroids different from viruses?

Explain in detail about modern concept of evolution.

List three symptoms of high altitude sickness and state three adaptations to overcome it.