(c) nucleotides, amino acids, nucleic acids, enzymes
(d) enzymes, amino acids, proteins, nucleic acids.- Which of the following is the correct sequence of events in
the origin of life?
I. Formation of protobionts
II. Synthesis of organic monomers
III. Synthesis of organic polymers
IV. Formation of DNA-based genetic systems
(a) I, II, III, IV (b) I, III, II, IV
(c) II, III, I, IV (d) II, III, IV, I - Adaptive radiation refers to
(a) evolution of different species from a common
ancestor
(b) migration of members of a species to different
geographical areas
(c) power of adaptation in an individual to a variety
of environments
(d) adaptations due to geographical isolation. - The most primitive among the living vascular plants are the
(a) ferns (b) brown algae
(c) mosses (d) cycads. - Stanley L. Miller performed the first successful experiment
to assess the validity of the claim for origin of organic
molecules in the primeval earth condition. The apparatus
contained every arrangement except that it was devoid of
(a) ammonia (b) methane
(c) oxygen (d) energy source. - What is the difference between spontaneous generation
and biogenesis?
(a) Biogenesis supposes that the non-living materials
can produce life, while spontaneous generation
follows the idea that living things come only from
the other living things.
(b) Spontaneous generation and biogenesis both
support the theory that non-living materials are
the source of living organisms.
(c) Spontaneous generation proposes that the non-
living materials can produce life, biogenesis
follows the idea that living things come only from
other living things.
(d) Spontaneous generation applies only to plants
and how they produce life, while biogenesis
applies to animals and how they produce life. - Tasmanian wolf is a marsupial while wolf is a placental
mammal. This shows
(a) convergent evolution
(b) divergent evolution
(c) parallelism
(d) inheritance of acquired characters.- Wings of bat, locust and pigeon are
(a) vestigial organs
(b) exoskeletal structures
(c) homologous organs
(d) analogous organs. - Which one of the following is incorrect about the
characteristics of protobionts (coacervates and microspheres)
as envisaged in the abiogenic origin of life?
(a) They were partially isolated from the surroundings.
(b) They could maintain an internal environment.
(c) They were unable to reproduce.
(d) They could separate combinations of molecules
from the surroundings. - Match the following and select the correct option from the
given codes.
Column I Column II- Mesozoic (i) Age of fishes
- Devonian (ii) Proliferation of reptiles
- Palaeocene (iii) Raise of modern mammals
- Permian (iv) Radiation of primitive
mammals
(v) Extinction of dinosaurs
(a) 1-(v), 2-(iv),3-(iii), 4-(ii)
(b) 1-(v), 2-(i), 3-(iv), 4-(ii)
(c) 1-(iv), 2-(i), 3-(ii), 4-(v)
(d) 1-(v), 2-(i), 3-(iv), 4-(iii)
- According to biogeographical evidences, Oriental realm and
Australian realm were separated by
(a) holarctic region (b) Wallace’s line
(c) mountains (d) sea. - Who among the following stated that “Ontogeny repeats
phylogeny”?
(a) Von Baer (b) Ernst Haeckel
(c) Dr. P.L. Sclater (d) A. R. Wallace - Development of running habit in 2-toed deer and 1-toed
horse with two vestigial splint bones shows
(a) divergent evolution (b) convergent evolution
(c) parallel evolution (d) both (a) and (b).
ANSWER KEY
- (a) 2. (c) 3. (b) 4. (b) 5. (a)
- (a) 7. (c) 8. (a) 9. (d) 10. (c)
- (b) 12. (c) 13. (b) 14. (c) 15. (a)
- (a) 17. (c) 18. (c) 19. (a) 20. (d)
- (c) 22. (b) 23. (b) 24. (b) 25. (c)