Question

Name the phenomenon that governs the following:
A. Green beetles living in green bushes are not eaten by the crows
B. All tall plants are obtained in $F_1​$ generation, upon crossing pure tall and dwarf pea plants.
C. Tails of mice were surgically removed for several generation; still mice have tails in the
following generation.
D. Numbers of blue beetles on green bushes increase in a fur distant location than green
beetles on green bushes, isolated by a river.
E. A migrant beetle reproduces with the local population, as a result genes of migrant beetle
enter the new population.

Answer 1

A. Green beetles living in green bushes are not eaten by cows because they prefer defensive mechanisms.
B. If we talk about this phenomenon it is showing the heterozygous condition.
C. After performing an experiment mice still have tails because which was removed was a physiological character and was not genetically done.
D. Numbers of blue beetles on green bushes increase in a fur distant location than green
beetles on green bushes, isolated by a river as it shows the speciation.
E. Above mentioned condition also involves the migration of genes within them which results in a new population.

Complete answer:
A. The defence strategy is shown by the green beetles present in the green bushes to defend
themselves from the predators. The strategy used is camouflage: which is the ability of the
organisms to mimic their surrounding so that they can escape from the sight of their
predators.
B. When the cross is done between pure tall and dwarf pea plant, $F_1$ generation formed will
have heterozygous condition having tall plant phenotype as there is presence of dominant
allele in all four $F_1$ plants.
C. The surgical removal of tails in mice is not passed from one generation to another because it
does not involve any genetic change in mice, it only physically removes the tails of the
individual mice. Only the genetic variation produced will be passed from generation to
generation.
D. Isolation of populations due to any geographical barrier is known as allopatric speciation.
The sub-population of blue beetles emerges from the main population of green beetles due
to the barrier between them which is the river in this case.
E. When mating occur between the local and the migrant beetle population, the genes of
migrant population will enter the local population which is known as the process of gene
flow. This gene flow will increase the variation of the diversity in that particular area for
beetle population.

Note: All the processes discussed in the above statements improve the diversity of nature. The defence strategy will prevent them from being extinct, the dominant character will prevail more,
the better genetic makeup will be passed on and the gene flow will add some important and
adventitious genes in the population.