MCQ Questions on Organisms and Populations
1. A group of populations of two or more species occupying the same geographical area at the same time is called
(a) Ecosystem
(b) Commensalism
(c) Interaction
(d) Community
Answer
Answer: (d) Community
2. Biotic factors include
(a) Plants and animals
(b) Water temperature, fish
(c) Plants, animals and physical environment
(d) None of the above
Answer
Answer: (a) Plants and animals
3. An organism that lives in or on another organism and derives nutrients for itself at the expense of the host organism is called _______
(a) Scavenger
(b) Prey
(c) Predator
(d) Parasite
Answer
Answer: (d) Parasite
4. A population that exhibits birth rates that are identical to the death rate implies
(a) Initial growth
(b) Plateau phase
(c) Acceleration Phase
(d) None of the above
Answer
Answer: (b) Plateau phase
5. An example of a terrestrial gastropod is
(a) Sea hares
(b) Nudibranch
(c) Garden snail
(d) None of the above
Answer
Answer: (c) Garden snail
6. Antifreeze proteins or AFPs enable organisms that possess it to
(a) Survive high temperatures
(b) Survive extreme pressure
(c) Survive subzero temperatures
(d) None of the above
Answer
Answer: (c) Survive subzero temperatures
7. A group of individuals from different species living in the same habitat and exhibiting functional interactions is called
(a) Biotic community
(b) Population
(c) Ecosystem
(d) None of the above
Answer
Answer: (a) Biotic community
8. Xerocoles are
(a) Animals adapted to live in the tundra
(b) Animals adapted to live in deserts
(c) Animals adapted to live in the deep sea
(d) Animals adapted to a nocturnal lifestyle
Answer
Answer: (b) Animals adapted to live in deserts
9. Fossorial refers to
(a) Animals that turned into fossils
(b) Animals that are adapted to burrowing
(c) Animals that are adapted to climbing
(d) None of the above
Answer
Answer: (b) Animals that are adapted to burrowing
10. _________ is the unrestricted growth of populations, which will result in the maximum growth of that population
(a) Biotic Potential
(b) Nutritive potential
(c) Uricotelism
(d) None of the above
Answer
Answer: (a) Biotic Potential
11. Crassulacean acid metabolism in plants helps to __________
(a) Serves no function
(b) Retain water
(c) Increase resistance to disease
(d) None of the above
Answer
Answer: (b) Retain water
12. Niche Density is _________
(a) Extinction of species in a new habitat
(b) A New emerging population of species in a new habitat
(c) The abundance of a population of species outside its habitat
(d) The abundance of a population of species within its habitat
Answer
Answer: (d) The abundance of a population of species within its habitat
13. Xerophytes generally do not possess ________
(a) A thick cuticle
(b) Spongy Parenchyma
(c) Specialized mechanical tissue
(d) Well developed conducting tissue
Answer
Answer: (b) Spongy Parenchyma
14. Competition is most fierce between
(a) Unrelated species in the same environment
(b) Two or more closely related species in the same environment
(c) Two or more closely related species in a different environment
(d) None of the above
Answer
Answer: (b) Two or more closely related species in the same environment
15. Mimicry is
(a) An evolved resemblance between an organism and an object
(b) An adaptation made for finding mates
(c) An adaptation for surviving temperature fluctuations
(d) None of the above
Answer
Answer: (a) An evolved resemblance between an organism and an object