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WorksheetsBiology
Total questions: 10
Worksheet time: 5mins
1. Evolutionary convergence is characterised by
development of characteristics by random mutations.
development of similar characteristics in different groups of organisms of different ancestry.
development of dissimilar characteristics in closely related groups of organisms
2. Homologous organs indicate
(a) convergent evolution.
(b) divergent evolution.
(c) adaptive radiation.
3. Darwin judged the fitness of individuals by
(a) ability to defend itself.
(b) strategy to obtain food.
(c) number of offspring produced.
4. Change of frequency of alleles in a population results in evolution. This statement is proposed in
(a) Darwin’s theory
(b) Lamarck’s theory
(c) Hardy-Weinberg principle
5. Select the correct statement from the following options.
(a) Mutations are random and directional.
(b) Darwinian variations are small and direction less.
(c) Fitness is the end result of the ability to adapt and get selected by nature.
6. Which type of selection is industrial melanism observed in moth, Biston bitularia [NCERT Exemplar]
(a) Stabilising
(b) Directional
(c) Disruptive
7. Analogous organs arise due to [NCERT Exemplar]
(a) divergent evolution
(b) artificial selection
(c) genetic drift
(a) convergent evolution
8. The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because [NCERT Exemplar]
(a) one organism has given rise to another
(b) they share a common ancestor
(c) they perform the same function
9. Appearance of antibiotic-resistant bacteria is an example of [NCERT Exemplar]
(a) adaptive radiation
(b) transduction
(c) pre-existing variation in the population
10. In 1953 S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from preexisting non-living organic s molecules. The primitive earth conditions created include [NCERT Exemplar]
(a) low temperature, volcanic storms, atmosphere rich in oxygen
(b) low temperature, volcanic storms, reducing atmosphere
(c) high temperature, volcanic storms, reducing atmosphere containing CH4, NH3 etc.
