Plant Growth and Mineral Nutrition — BIOLOGY STD 12 Science — Question

The animals in which complete embryo develops in the mother's body through placenta are:

Decrease in platelet count is called …………………..

In mammals, the estrogens are secreted by the graafian follicle from its ……………….

In forest ecosystem, the pyramid of energy is:

A successful forest conservation strategy should involve:

There are various types of reproduction. The type of reproduction adopted by an organism depends on:

Which one of the following produces antibodies ?

In the RNA molecule, which nitrogen base is found in place of thymine?

A large number of married couples the world over are childless. It is shocking to know that in India the female partner is often blamed for the couple being childless.

1. Why in your opinion the female partner is often blamed for such situations in India? Mention any two values that you as a biology student can promote to check this social evil.
2. State any two reasons responsible for the cause of infertility.
3. Suggest a technique that can help the couple to have a child where the problem is with the male partner.

Which one of the following statements is correct ?