Question

Q. Name the Phenomena.
i) Green beetles living in green bushes are not eaten by the crows.

ii) Number of blue beetles in green bushes increases, only because the red beetles living there were trampled by a

herd of elephants.


iii) No ‘medium height plants’ are obtained in F1 generation, upon crossing pure tall and dwarf pea plants.

iv) Tails of mice were surgically removed for several generations; still mice had tails in the following generations.

v) A migrant beetle reproduces with the local population; as a result genes of migrant beetle enter the new

population

Answer 1

Due to natural selection ..
Camouflage phenomena is occur

Answer 2

i)Natural selection

ii)Genetic Drift

iii)Because the trait of medium height is not present as recessive trait.As the crossed parents do not contain a medium heightened plant

iv)It is because cutting of the tail do not make any change in DNA of germ cell and hence is not passed on to the next generation.

v)the new population will show traits of the migrant beetle.