[" 1.Industrial Melanism is an [WB JEEM "2014]],[" a) Effect of industrial pollution "],[" b) Effect of mutation "],[" c) Evidence of survival of fittest "],[" d) Evidence in favour of Natural Selection "]

Write Explanatory notes on (a) effect of air pollution on vegetation(b) BOD (c) thermal pollution (d) radioactive disposal.

Industrial melanism in peppered moth occurred due to natural selection . The significant reason for this is (a) the light coloured white moths could not be noticed by predatory birds after deposition of soots on bark of trees (b) mutation in light coloured moths due to increase in industrial pollution (c) advantageous selection of black moths on tree in polluted areas, resulting in increase population of black moths (d) advantageous selection of white moths on tree in polluted areas, resulting in increased population of white moths

Sudden addition or deletion of genes by chance in a small population is called (a) Sewall wright effect (b) Mutation (c) Gene flow (d) Gene migration

Given below are four statements (A - D) each with one or more blanks. Statement: (A) Eyes of (i) and mammals look alike and are results of (ii) evolution. (B). Nictating membrane is a (i) organ and an (ii) evidence of evolution. (C) Miller provided an experimental evidence of (i) evolution in a sealed chamber containing CH_4 , NH_3 , H_2 and (ii) (D) Industrial melanism is an example of (i ) . Select the option which correctly fills up the blanks in two statements.

According to modern synthetic theory of evolution proposed by Dobzhansky, all of the following are causes of genetic variability except (a) Gene mutations (b) Genetic recombination (c) Changes in chromosome number (d) Natural selection