Control and Co-ordination — BIOLOGY STD 12 Science — Question

Vaccination.

How Indian culture and traditions helped in bio-diversity conservation? Give importance of conservation in terms of utilitarian reasons.

Rose plants produce large, attractive bisexual flowers but they seldom produce fruits. On the other hand a tomato plant produces plenty of fruits though they have small flowers. Analyse the reasons for failure of fruit formation in rose.
Both these plants - rose and tomato - both selected by human beings for different characteristics, the rose for its flower and tomato for its fruit. Roses, being vegetatively propagated do not need to produce seeds.

The relation between species richness and area for a wide variety of taxa turns out to be a rectangular hyperbola. Give a brief explanation.

Discuss transgenic animals. Explain any four ways in which such animals can be beneficial for humans.

1. Explain the steps involved in in vitro fertilisation, popularly known as test tube baby programme.
2. State the importance of this programme.

Entomophily

Explain "the law of independent assortment" with a suitable example.

Distinguish between: Natality and Mortality.