STD 12 - 3. reproductive health — BIOLOGY STD 12 Science — Question

In human beings, after one month of pregnancy the embryo formed :

If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be:

Population density of terrestrial organisms is measured in terms of individual per _________?

A person may have one gene for normal haemoglobin and one gene for sickle cell haemoglobin.This heterozygous condition is called as:

A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. Thus boy

ZIFT is transfer of:

Which of the following is an artificial ecosystem

One codon codes for only one amino acid, hence the code is