(c) both plant and animal kingdoms
      (d) A part of plant kingdom
Ans: (b)
401. Bacteria utilising radiant energy to prepare food are
      (a) chemosynthetic bacteria
      (b) heterotrophic bacteria
      (c) photosynthetic bacteria
      (d) free living bacteria
Ans: (c)
402. What are top carnivores?
      (a) biggest carnivores
      (b) tigers
      (c) all carnivorous animals
      (d) carnivores that are not eaten by any other animal
Ans: (d)
403. The layer of stagnant water in which light penetrates is called
      (a) Aphotic
      (b) Euphotic
      (c) Epilimnion
      (d) Disphotic
Ans: (b)
404. The theory that cells arise from the pre-existing cells was proposed by
      (a) Nageli
      (b) Virchow
      (c) Schleiden
      (d) Muller
Ans: (b)
405. The most primitive mammals are
      (a) carnivorous
      (b) herbivorous
      (c) omnivorous
      (d) insectivorous
Ans: (d)
406. Agroecology relates
      (a) crops and productivity
      (b) crops and environment
      (c) crop productivity and physiology
      (d) crop resistance to climatic changes
Ans: (b)
407. Light compensation zone refers to
      (a) where light is available in plenty
      (b) where all light energy is used
      (c) where light is maximum
      (d) beyond which light does not penetrate
Ans: (d)
408. Nekton are those organisms
      (a) which cannot be netted
      (b) which are independent of tides and waves
      (c) which have long necks
      (d) None of the above
Ans: (b)
409. Darwinism does not explain
      (a) progression
      (b) retrogression
      (c) usefulness of all organs
      (d) presence of vestigial organs
Ans: (d)
410. Phototropism means that plants react to the direction of
      (a) sound
      (b) wind
      (c) light