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(d) birds have evolved from reptiles..
(a) one
(c) 1:1
(a) copies of the same chromosome
(c) Size of body
(b) accumulation of variations over several generations
(a) Two individuals of a species
(c) both maternal and paternal DNA
(a) All variations in a species have equal chance of survival
(b) the extinction of organism has occurred thousands of years ago
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
(d) birds have evolved from reptiles..
(d) birds have evolved from reptiles..
See lessThe number of pair (s) of sex chromosomes in the zygote of humans is
(a) one
(a) one
See lessln peas, a pure tall plant (TT) is crossed with a shot plant (tt). The ratio of pure tall plants to short plants in F₂. is
(c) 1:1
(c) 1:1
See lessThe two versions of a trait (character) which are brought in try the male and female gametes are situated on
(a) copies of the same chromosome
(a) copies of the same chromosome
See lessFrom the list given below, select the character which can be acquired but not inherited:
(c) Size of body
(c) Size of body
See lessAccording to the evolutionary theory, formation of a new species is generally due to
(b) accumulation of variations over several generations
(b) accumulation of variations over several generations
See lessSelect the group which shares maximum number of common characters :
(a) Two individuals of a species
(a) Two individuals of a species
See lessA trait in an organism is influenced by
(c) both maternal and paternal DNA
(c) both maternal and paternal DNA
See lessWhich of the following statements is not true with respect to variation?
(a) All variations in a species have equal chance of survival
(a) All variations in a species have equal chance of survival
See lessIf the fossil of an organism is found in the deeper layers of earth, then we can predict that
(b) the extinction of organism has occurred thousands of years ago
(b) the extinction of organism has occurred thousands of years ago
See less