MCQ’S ON Species Diversity
1. The following practice has led to the maximum damage to the diversity of Indian forests
(a) Block cutting
(b) Selective harvesting
(c) Jhum cultivation
(d) Taungya cultivation
Answer: :: (c)
2. Plant species on the verge of extinction as a result of over-exploitation is
(a) Gloriosa
(b) Centella
(c) Podophyllum
(d) All of the above
Answer: :: (c)
3. This endangered animal is the source of the world’s finest, lightest, warmest and the most expensive wool – the shahtoosh
(a) Cheetal
(b) Kashmiri goat
(c) Nilgai
(d) Chiru
Answer: :: (d)
4. This group of vertebrates comprises of the highest number of endangered species
(a) Fishes
(b) Birds
(c) Reptiles
(d) Mammals
Answer: :: (d)
5. Indri-indri lemur is found in
(a) India
(b) Sri lanka
(c) Madagaskar
(d) Mauritius
Answer: :: (c)
6. This is not under situ conservation
(a) Botanic Garden
(b) National park
(c) Statuary
(d) Biosphere reserve
Answer: :: (a)
7. One of the endangered species of the Indian medicinal plants is
(a) Garlic
(b) Ocimum
(c) Nependenthes
(d) Podophyllum
Answer: :: (d)
8. Siberian crane is a regular visitor of bird sanctuary
(a) Bharatpur (Rajasthan)
(b) Ranaganathittu (Karnataka)
(c) Lalbagh (Karnataka)
(d) Vedanthangal (T.N)
Answer: :: (a)
9. Sacred groves are useful in
(a) Preventing soil erosion
(b) generating environmental awareness
(c) conservation rare and threatened species
(d) year-round flow of water in rivers
Answer: :: (c)
10. Species very near to extinction if conservation measures are promptly not take up are
(a) Rare species
(b) threatened species
(c) endangered species
(d) vulenrable species
Answer: :: (c)
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MCQ on Apomixis
1. In many laboratories, active research is on to comprehend the genetics of apomixis
(a) Apomixis generates genetically different individuals
(b) Apomixis is the method to produce seeds without fertilization
(c) Hybrid plants are directly formed by apomixis
(d) Transfer of apomictic genes into hybrid varieties that shall prevent hybrid vigour loss over the years
Answer: :: (d)
2. Apomixis is a form of
(a) Vernalization
(b) Parthenogenesis
(c) Parthenocarpy
(d) None of the above
Answer: :: (b)
3. Geitonogamy and autogamy both are prevented in which one of these?
(a) Cucumber
(b) Maize
(c) Castor
(d) Papaya
Answer: :: (d)
4. In plants, apomixis pertains to plant development
(a) from root cuttings
(b) from cuttings of stem
(c) without the gametes having to fuse
(d) fusion of gametes
Answer: :: (c)
5. The reason why hybrid seeds have to be produced every year is
(a) hybrid seed industry tends to increase the cost of seeds
(b) hybrid plants turn sterile in coming years
(c) show more heterosis in coming years
(d) hybrid vigour is not maintained in more than one generation as segregation of genes is initiated in the second generation
Answer: :: (d)
6. In adventive embryony, a type of apomixis, the embryo develops directly from the
(a) Zygote
(b) accessory embryo sacs in the ovule
(c) antipodals or synergids in an embryo sac
(d) integuments or nucleus
Answer: :: (d)
7. Megasporium is equivalent to
(a) ovule
(b) embryo sac
(c) fruit
(d) Nucleus
Answer: :: (a)
8. One of these statements about apomixis is incorrect
(a) formation of seeds without fertilization
(b) Meiotic division and fertilization of gametes takes place to form a zygote
(c) Seeds are genetically similar
(d) None of these
Answer: :: (b)
9. This about apomixis is true:
(a) There is no fertilization involved in both apomixis and parthenocarpy
(b) Apomixis produces genetically identical mother cells
(c) Apomixis is observed in angiosperms and gymnosperms
(d) All of the above
Answer: :: (d)
10. The difference between perisperm and endosperm is that perisperm:
(a) has reserve food
(b) forms by fusion of the secondary nucleus with several sperms
(c) is a diploid tissue
(d) is a haploid tissue
Answer: :: (c)
