STD 11 - 7. Structural organisation in animal — NEET STD 11 Science — Question

According to recent knowledge, the pineal body is considered as

A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?

Which one of the following is the most widely accepted method of contraception in India at present?

Which of the following is related to the production of lymphocytes and antibodies

Statement I: When more than one adaptive radiation appeared to have occured in an isolated geographical area (representing different habitats) is convergent evolution.
Statement II: Darwin's finches represents the phenomenon of adaptive radiation.

Which of the following option is correct for given statements ?
(i) About 3000 million years ago (mya) the first cellular forms of life appeared on earth.
(ii) Some of these cells had the ability to release O became multi-cellular life forms.
(iii) By the time of 500 mya, invertebrates were formed and active.
(iv) Jawless fish probably evolved around 350 mya.
(v) About 250 mya fish with stout and strong fins could move on land and go back to water.
(vi) Probably 200 mya some of land reptiles like dinosaurs went back into water to evolve into fish like reptiles Ichthyosaurs.
(vii) Coelacanth called lobefins evolved into the first amphibians that lived on both land and water.

The opening of rectum in frog is called

An intestinal hormone that stimulates the pancreas to release a watery secretion that is rich in bicarbonate ions: