Botany Solved Multiple choice Questions

Botany Solved Multiple choice Questions
Solved Multiple Choice Questions in Botany
Free Multiple Choice Botany For AIIMS PMT
1. True xerophytes have
(a) lower rate of transpiration than mesophytes
(b) transpiration rate equal to mesophytes
(c) transpiration rate higher than mesophytes
(d) no transpiration
Ans. (a)

2. Plants growing in extremely cold soils are
(a) halophytes
(b) psammophytes
(c) oxylophytes
(d) psychrophytes
Ans. (d)

3. Xerophytes have long roots
(a) due to light
(b) to draw water from deep water beds
(c) to give mechanical support
(d) none of the above
Ans. (b)

4. The orchid plants, which are found growing on the trees, are
(a) parasites
(b) epiphytes
(c) saprophytes
(d) lithophytes
Ans. (b)

5. In submerged hydrophytes functional stomata are found
(a) on lower surface of leaf
(b) on both the surface of leaf
(c) no where on the plant
(d) on upper surface of leaf
Ans. (c)

6. What is the relationship between water-fern(Azolla) and nitrogen-fixing
cyanobacteria(Anabaena) called?
(a) Symbiotic
(b) Predation
(c) Parasitic
(d) Epiphytic
Ans. (a)

7. When animals feed on other dead animals, which had died naturally or had been
killed by another animals, the relationship is termed as
(a) predation
(b) competition
(c) scavenging
(d) symbiosis
Ans. (c)

8. The first plants to reappear in a badly burned forest area will most probably be
(a) liverworts
(b) ferns
(c) grasses
(d) mosses
Ans. (b)

9. The transfer of energy from organism to organism in a natural community establishes
(a) food chains
(b) biological control
(c) natural barriers
(d) all the above
Ans. (a)

10. First link to any food chain is a green plant because
(a) fixed at one place
(b) they alone have the capacity to synthesise food
(c) they can eat every thing
(d) they respire
Ans. (b)

11. Which is a primary consumer?
(a) Scavenger
(b) Saprophyte
(c) Carnivore
(d) Herbivore
Ans. (d)

12. Trophic levels are formed by
(a) plants only
(b) animals only
(c) carnivores only
(d) organisms linked in food chain
Ans. (d)

13. Energy and nutrients enter a community by way of the
(a) producers
(b) consumers
(c) detrivores
(d) scavengers
Ans. (a)
14. The following groups of organisms represent different trophic levels. Which out of
these four has the greatest biomass?
(a) Herbivores
(b) Carnivores
(e) Autotrophs
(d) Decomposers
Ans. (c)

15. The food chain that starts from plants and goes from smaller to larger animals is
(a) predator food chain
(b) saprophytic food chain
(c) detritus food chain
(d) parasitic food chain
Ans. (a)

16. A crocodile had just eaten a lamb when a hawk saw the crocodile, attacked it and
consumed it.The hawk is in ecological terms
(a) a producer
(b) a primary consumer
(c) a secondary consumer
(d) tertiary consumer
Ans. (d)

17. Organisms of the same trophic level are
(a) deer and honey bee
(b) cheetah and wild bear
(c) snake and earthworm
(d) crow and cow
Ans. (a)


18. Driving force of ecosystem is
(a) carbohydrate in plants
(b) biomass
(c) solar energy
(d) producer
Ans. (c)

19. Which of the following is upright in all the ecosystems?
(a) Pyramid of number
(b) Pyramid of energy
(c) Pyramid of biomass
(d) All the above
Ans. (b)


20. In an aqueous environment microscopic animals and plants are collectively known as
(a) herbivores
(b) fauna and flora
(c) planktons
(d) symbionts
Ans. (c)

21. Which one of following word is related to Homo sapiens?
(a) Herbivore
(b) Carnivore
(c) Omnivore
(d) Autotroph
Ans. (c)

22. Biogeochemical cycles are also known as
(a) cycles of matter
(b) sedimentary cycles
(c) material cycling
(d) gaseous cycles
Ans. (a)


23. The leguminous plants are important in agriculture because
(a) they need very little water to grow
(b) they are disease resistant
(c) they help in nitrogen economy of the plants
(d) six crops of leguminous plants are harvested in a year
Ans. (c)

24. The denitrification means
(a) reduction of NO2 to ammonia by bacteria in the soil
(b) conversion of ammonia to amino acids
(c) conversion of ammonia and nitrates to gaseous nitrogen
(d) oxidation of ammonia titrate
Ans. (c)

25. Which of the following contribute to the carbon cycle?
(a) Photosynthesis
(b) Respiration
(c) Fossil fuel combustion
(d) A1l of these
Ans. (d)