Biology Times March 19
- Artificial selection to obtain cows yielding higher
milk output represents : (NEET 2017)
(a) Directional as it pushes the mean of the
character in one direction
(b) Disruptive as it splits the population
into two, one yielding higher output
and the other lower output
(c) Stabilizing followed by disruptive as
it stabilizes the population to produce
higher yielding cows
(d) Stabilizing selection as it stabilizes this
character in the population
- Homozygous purelines in cattle can be obtained by:
(NEET 2017)
(a) Mating of unrelated individuals of same breed.
(b) Mating of individuals of different breed.
(c) Mating of individuals of different species.
(d) Mating of related individuals of same breed.
- A true breeding plant is (NEET 2016)
(a) Always homozygous recessive in its genetic
constitution.
(b) One that is able to breed on its own.
(c) Produced due to cross pollination among
unrelated plants.
(d) Near homozygous and produces offspring of
its kind.
- You are given a tissue with its potential for
differentiation in an artificial culture, which of the
following pairs of hormones would you add to the
medium to secure shoots as well as roots.
(NEET 2016)
(a) IAA & Gibberellins
(b) Auxin & Cytokinin
(c) Auxin & Abcissic acid
(d) Gibberellins & Abcissic acid
- Interspecific hybridisation is the mating of
(NEET 2016)
(a) More closely related individuals within same
breed for 4-6 generations.
(b) Animals within same breed without having
common ancestors.
(c) Two different related species
(d) Superior males and females of different breeds
- Among the following edible fishes, which one is a
marine fish having rice source of omega-3 fatty
acids? (NEET 2016)
(a) Mystus (b) Mangpur
(c) Mackerel (d) Mrigala
- The amino acid Tryptophan is the precursor for the
synthesis of (NEET 2016)
(a) Cortisol & Cortisone
(b) Thyroxide & Triiodothyroxine
(c) Melatonin & Serotonin
(d) Estrogen & Progesterone
8.Which of the following statement is not correct?
(NEET 2016)
(a) Pollengrains of many species can
germinate on the stigma of a flower, but only
STRATAGIES FOR ENHANCEMENT IN FOOD PRODUCTION
