Ecosystems — BIOLOGY STD 12 Science — Question

At present, Chikungunya disease has been confirmed in different parts of the country. Write the name of the carrier (bacteria) responsible for this disease.

How does malaria differ from chikungunya with reference to their vectors?

Name the type of biodiversity represented by the following:

1. 1000 varieties of mangoes in India.
2. Variation in terms of potency and concentration of reserpine in Rauwolfia vomitoria growing in different regions of Himalayas.

Name the interaction that exists between sucker fish and shark.
OR
Name the type of interaction that exists between barnacles and whale.

OR
Comment on the interaction between a clown fish living among the tentacles of a sea anemone.

Name an industry which can cause air pollution, thermal pollution and eutrophication.

From which galaxy did the Earth originate?

How does the sperm penetrate through the zona pellucida in human ovum?

(a) Write the scientific name of the plant which Natural cannabinoids are obtained.
(b) Write the names of the parts of the plant which are used to obtain drugs.
(c) How does this drug affect the human body?

The microscopic pollen grains of the past are obtained as fossils. Mention the characteristic of the pollen grains that makes it happen.