CSIR JRF NET Biodiversity MCQs Questions Part - 3

21. Land plants arose during the
(a) Ordovician (b) Jurassic
(c) Cambrian (d) Carboniferous

22. Most bryophytes, such as mosses, differ from all other plants in that they
(a) do not produce flowers (b) have cones but no seeds
(c) have flagellated sperm (d) lack vascular tissue
23. Deep in the tropical rain forest, a botanist discovered an unusual plant with highly developed vascular tissue, stomata, flagellated sperm, cone-like reproductive structures bearing seeds, and an alternation of generations life cycle. He was very excited about this discovery because it would be rather unusual for a plant to have both
(a) highly developed vascular tissue and flagellated sperm
(b) vascular tissue and alternation of generations
(c) seeds and flagellated sperm
(d) alternation of generations and seeds
24. The Ozone layer saves from lethal UV. It mainly absorbs-
(a) UV-A (b) UV-B
(c) UV-A & B (d) UV-B & C
25. Besides nomenclature of plants in wild, ICBN also gives binomial names for-
(a) Bacteria & Fungus (b) Fungus
(c) Fungus & cultivated plants (d) Cultivated plant
26. __________ are not native to a particular area, and can upset the balance of the ecosystem.
(a) Exotic species (b) Ultraviolet waves
(c) Decomposers (d) Reintroduction programs
27. What is the difference between a threatened species and an endangered species?
(a) A threatened species means that the population is likely to become endangered An endangered species has population numbers so low that it is likely to become extinct
(b) A threatened species is already extinct. An endangered species means that the population’s numbers have increased greatly over the last 5 years
(c) A threatened species means that the population is likely to become endangered.An endangered species is already extinct
(d) A threatened species and an endangered species are the same thing
28. Which of these programs is used to preserve a species facing extinction?
(a) edge effects (b) sustainable use
(c) natural resources (d) captive breeding
29. What does this figure illustrate?
(a) habitat fragmentation
(b) biodiversity
(c) extinction
(d) edge effect
30. The maximum biodiversity in India occurs at-
(a) Western Himalayas (b) North East Himalayas
(c) Western Ghats (d) Eastern Ghats

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