- Refer to the given figure and answer the following
questions.
A B
C
(a) Identify A, B and C in the given figure.
(b) Write down the composition of labelled part C.
(c) Briefly describe two functions of the labelled part A.
chApTer-7 : eVOLUTION
Multiple choice Questions
- Which compounds were used by Miller in his experiment
for obtaining amino acids and other organic substances?
(a) Ammonia, methane, hydrogen and water vapour
(b) Carbon dioxide, water vapour and methane
(c) Ammonia, methane and carbon dioxide
(d) Methane, ammonia, water vapour and hydrogen
cyanide
- In a population of 1000 individuals 360 belong to genotype
AA, 480 to Aa and the remaining 160 to aa. Based on this
data, the frequency of allele A in the population is
(a) 0.4 (b) 0.5
(c) 0.6 (d) 0.7.
- The eye of octopus and eye of cat show different patterns
of structure, yet they perform similar function. This is an
example of
(a) analogous organs that have evolved due to
convergent evolution
(b) analogous organs that have evolved due to divergent
evolution
(c) homologous organs that have evolved due to
convergent evolution
(d) homologous organs that have evolved due to
divergent evolution.
- Choose the correct series of human evolution.
(a) Dryopithecus → Homo erectus → Australopithecus
→ Cro-Magnon man
(b) Australopithecus → Homo erectus → Neanderthal
man → Homo sapiens
(c) Australopithecus → Ramapithecus → Dryopithecus
→ Homo sapiens
(d) Homo erectus → Australopithecus → Cro-Magnon
man → Neanderthal man
5. The Hardy-Weinberg principle cannot operate if
(a) the population is very large
(b) frequent mutations occur in the population
(c) the population has no chance of interaction with
other populations
(d) free interbreeding occurs among all members of the
population.
6. Biogenetic law given by Haeckel states that
(a) ontogeny recapitulates phylogeny
(b) phylogeny recapitulates ontogeny
(c) ontogeny and phylogeny go together
(d) there is no relationship between phylogeny and
ontogeny.
7. An isolated population of humans with approximately
equal number of blue-eyed and brown-eyed individuals
was decimated by an earthquake. Only a few brown-eyed
people remained to form the next generation. This kind of
change in the gene pool is called a
(a) Hardy-Weinberg equilibrium
(b) blocked gene flow
(c) bottleneck effect
(d) founder effect.
8. Which is the correct order of increasing geological time
scale for a hypothetical vertebrate evolution?
(a) cenozoic, mesozoic, palaeozoic, precambrian
(b) cenozoic, palaeozoic, mesozoic, precambrian
(c) precambrian, cenozoic, palaeozoic, mesozoic
(d) precambrian, palaeozoic, mesozoic, cenozoic
9. Dinosaurs were present during
(a) palaeozoic era (b) mesozoic era
(c) cenozoic era (d) proterozoic era.
10. Darwin’s finches are a good example of
(a) industrial melanism
(b) connecting link
(c) adaptive radiation
(d) convergent evolution.
True or False
- The first fossils of vertebrates were found in the rocks of
the ordovician period in the form of ostracoderms.
- The deme is a group of populations with common gene
pool.
- When divergent evolution is found in closely related species,
it is called parallel evolution.
- Homozygotes for the sickle cell trait are exceptionally
resistant to malaria.
- Latimeria is a connecting link between fishes and
amphibians.
