Biology MCQs

11. The mosquito fern or Azolla is used as a biofertiliser because it__:
[A] Multiplies very fast to produce massive biomass
[B] Has association of nitrogen-fixing Rhizobium bacteria
[C] Has association of nitrogen fixing bluegreen algae
[D] Has association of mycorrhiza

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12. What is the number of mitochondria present in a bacterial cell?
[A] Zero
[B] One
[C] Two
[D] Four

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13. Which part of the plant is used in making saffron spice?
[A] Stigma
[B] Sepal
[C] Petal
[D] Leaf

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14. Exobiology refers to the study of which of the following?
[A] Organism
[B] Endodermis
[C] Life in the air
[D] Life on the other planets

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15. The sporophytic generation is represented only by the zygote__?
[A] Funaria
[B] Chlamydomonas
[C] Pinus
[D] Pinus

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16. Which of the following is the proof of the aquatic origin of bryophytes?
[A] Ciliated sperms
[B] Green colour
[C] Protonema thread
[D] Some are still aquatic

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17. Fruits are not found in gymnosperm plants because__?
[A] They are seedless plants
[B] They are not pollinated
[C] They have no ovary
[D] Process of fertilization does not take place in them

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18. Which of the following is a compound leaf having an axis on either side of the midrib?
[A] Imparipinnate
[B] Unipinnate
[C] Bipinnate
[D] Pinnate

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19. Which of the following also play a role in protecting plants against bacterial and fungal infections?
[A] Jasmonates
[B] Oligosaccharins
[C] Strigolactones
[D] Brassinosteroids

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20. Which of the following is rat-fish?
[A] Salmons
[B] Lamprey
[C] Sharks
[D] Chimeras

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