STD 12 - 2. human reproduction — NEET STD 11 Science — Question

Given below are two statements
Statement I :
Many bony fishes are ammonotelic while mammals are ureotelic.
Statement II :
Reptiles are uricotelic while birds are ureotelic.
Choose the correct answer from the option given below:

The stage transferred into the uterus after induced fertilization of ovum in the laboratory is

Choose correct option for given statements :
(i) The universe is very old almost 20 billion years old.
(ii) In the solar system of the milky way galaxy, earth was supposed to have been formed about 4.5 billion years back.
(iii) Life appeared 500 million years after the formation of earth.
(iv) The first non-cellular forms of life could have originated 3 billion years back. They would have been giant molecules (RNA, Protein, Polysaccharides, etc.).
(v) The first cellular form of life did not possibly originate till about 2000 million (2 billion) years ago. These were probably single-cells.
(vi) All life forms were in water environment only.

The pesticides are the chemicals that kill

Coelom is cavity found between

Main source of amoebic dysentery is

What we find in the galaxies?

The process of maturation of reproductive cells of testes in male so as to form the male gamete or sperm is known as