STD 12 - 6. evolution — NEET STD 11 Science — Question

Toxic agents present in food which interfere with thyroxine synthesis lead to the development of

In humans, exchange of gases occurs

Brain stem is formed by .........

Mark the given statements True (T) or False (F).
(i) Stellar distances are measured in light year.
(ii) The universe is 200 billion years old.
(iii) Big Bang theory explain origin of earth.
(iv) The earth was supposed to have been formed about 4.5 billion years back.
(v) Life on earth appeared about 3 billion years back.
(vi) According to spontaneous generation theory. life came out of decaying and rotting matter.
(vii) Louis Pasteur demonstrated that life comes only from pre-existing life.
(viii) Oparin of Russia and Haldane of England proposed that formation of life was preceded by chemical evolution.
(ix) Miller in his experiment observed the formation of protein.
(x) According to special creation theory, earth is about 4000 years old.
Choose the correct option given below :-

Select correct pair.

The condition in which there are more than two complete set of chromosome is called

Assertion: All members of animalia are multicellular.
Reason: All of them do not exhibit the same pattern of organisation of cells.