STD 12 - 4. principal of inheritance and variation — NEET STD 11 Science — Question

The biggest phylum in regard to the number of species is

Which of the following statements are incorrect for Natural selection ?
(i) Natural selection is based on certain observations which are factual.
(ii) Populations are stable in size except for seasonal fluctuation, means that there had been competition for resources.
(iii) Variation is the most fundamental evolutionary factor and all variations are inherited to the progeny.
(iv) Variations which are heritable and which make resource utilisation better for few (adapted to habitat better) will enable only those to reproduce and leave more progeny.
(v) Herbicides, pesticides etc., resistant organisms/cells are appearing in a time scale of months or years and not centuries.
(vi) Appearance of herbicides, pesticides etc., resistant organisms/cells are examples of evolution by anthropogenic action.

The unique mammalian characteristics are:

Genotypic and phenotypic ratios remains the same in

Mendel was born in

A man takes large amount of protein. He is likely to excrete more amount of

Opium, morphine, heroin, pethidine and methadone are collectively called as

Action of vaginal diaphragm is

After vaccination the body builds up