Write two varieties of sugarcane having high sugar content.

Answer in Brief

CO - 419, 421, 453 are high yielding and having high sugar contents are developed in India at Coimbatore (Tamilnadu).

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Q 2.iii | 1 mark

Name the following:

The semi-dwarf variety of wheat is high-yielding and disease-resistant.

In an agricultural field there is a prevalence of the following organisms and crop diseases which are affecting the crop yield badly:

Recommend the varieties of crops the farmers should grow to get rid of the existing problem and thus improve the crop yield.

State one characteristic of millets that has been improved as a result of hybrid breeding so as to produce high yielding millet crops.

If a diploid cell is treated with colchicine then it becomes:

Mutations in plant cells can be induced by ______

Which one of the following is not a fungal disease?

Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of ______.

Name a man-made cereal? Trace how it was developed and where is it used?

Discuss the importance of testing of new plant varieties in a geographically vast country like India.

Discuss natural selection and artificial selection. What are the implications of the latter on the process of evolution?