Biodiversity and Conservation — BIOLOGY STD 12 Science — Question

Give the name of the hormone which is secreted by corpus luteum.

Why do you think the exine should be hard? What is the function of germ pore?

Co-evolution is a spectacular example of mutualism between an animal and a plant. Describe co-evolution with the help of an example.

In a Polymerase Chain Reaction (PCR), give the temperature required for the steps:

1. Denaturation.
2. Annealing.
3. Extension, respectively.

Public all over India is very much concerned about the deteriorating air quality in large parts of North India. Alarmed by this situation the Resident's Welfare Association of your locality organised an awareness programme entitled "Bury not burn'. They invited you, being a biology student to participate.

1. How would you justify your arguments that promote burying and discourage burning? (Give two reasons).
2. With the help of flowcharts, one for each practice, depict the chain of events that follow.

What is the role of transgenic animals in biological product?

1. Explain two approaches of biodiversity conservation.
2. Which conservation method is used to maintain the species of wildlife in their natural habitats?

Name and describe any three causes of biodiversity losses.

Write any four benefits of using GM plants.

Answer the following questions:
How do human males with ‘XXY’ abnormality suffer?