Science (English Medium) Class 12 - CBSE Question Bank Solutions

Freshly released human egg has ______.

Which one of the following statements about human sperm is correct?

Human eggs are______.

The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for ______.

During organ differentiation in Drosophila, an organ is modified to another organ (such as wings may be replaced by legs) Genes responsible for such metamorphosis are called ______.

Ratio of complementary genes is ______.

In some viruses, DNA is synthesised by using RNA as template. Such a DNA is called ______.

An individual exhibiting both male and female sexual characteristics in the body is known as ______.

Science of cultivation, breeding, marketing and arrangement of flowers is called ______.

Fragrant flowers with well developed nectaries are an adaptation for ______.

A couple has six daughters. What is the possibility of their having a girl next time?

The flower is the site of ______.

Monohybrid ratio is ______.

Genotype is the ______.

The physical expression or appearance of a character is called ______.

The alternate forms of a gene are called ______.

Pollen grains are well preserved as fossils because of the presence of ______

In a fertilized ovule, n, 2n, and 3n conditions occur respectively in ______

When an apparently healthy person is diagnosed as unhealthy by a psychiatrist, the reason could be that ______.  

The term ' health' is defined in many ways. The most accurate definition of health would be