Competition

Q. Which of the following statement(s) is incorrect?
I. In amensalism, one species is benefitted while the other is unaffected.
II. Predator is an organism that catches and kills the other organism for food.
III. Mutualism is a type of population interaction in which both the species are harmed.

1. I and II
2. Only II
3. Only III
4. I and III

Q. In which among the following population interactions, both the species get benefited and both bear the loss respectively?

1. Mutualism and predation
2. Commensalism and competition
3. Mutualism and parasitism
4. Mutualism and competition

Q.

The ______ is the topmost layer in a forest.

Q.

Connell’s elegant field experiments on rocky sea coasts of Scotland is the evidence of

1. Habitat diversification

2. Prudent predators

3. Competitive release

4. Competitive exclusion

Q.

__________ form the lowest layer of understoreys in the forests.

Q. Which statements are true?
(a) One is benefitted and other unaffected in mutualism.
(b) Both partners are benefitted in commensalism.
(c) One kills and feeds on another in predation.
(d) Both partners are benefitted in symbiosis.

1. a and b only
2. c and d only
3. b and c only
4. a and c only

Q.

Which of the following forest plants controls the light conditions at the ground?

1. Lianas and climbers

2. Shrubs

3. Tall trees

4. Herbs

Q. Given below are interactions depicted between two species with ‘+’ sign for beneficial interaction and ‘-’ sign for detrimental interaction. Choose the correct option(s).

1. Mutualism: species A (+) and species B (+).
2. Competition: species A (-) and species B (-).
3. Predation: predator (-) and prey (+).
4. Parasitism: parasite (+) and host (-).

Q. Amensalism is a type of population interaction in which

1. both the interacting species are benefitted
2. one species is benefited and the other species is harmed
3. one species is benefited and the other species is neither benefited or harmed
4. one species is harmed and the other species is neither benefited or harmed

Q.

The upper part of the trees, which act as speed breakers for fast wind is called?

1. Fodder

2. Crown

3. Shrub

4. Understoreys

Q. Which of the following is canopy ?

1. Tall trees
2. Short trees
3. Shrubs
4. None of these

Q.

Which of the following forest plants controls the light conditions at the ground?

1. Lianas and climbers

2. Shrubs

3. Tall trees

4. Herbs

Q. Give examples of animals found in temperature forests.

Q. Assertion :Generally the population of predator is small. Reason: Predator checks the population of prey.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. In a competitive interaction, both the species benefit from each other.

1. True
2. False

Q. Given below are interactions depicted between two species with ‘+’ sign for beneficial interaction and ‘-’ sign for detrimental interaction. Choose the correct option(s).

1. Mutualism: species A (+) and species B (+).
2. Competition: species A (-) and species B (-).
3. Predation: predator (-) and prey (+).
4. Parasitism: parasite (+) and host (-).

Q. 'Red tides' are produced by

1. Red algae
2. Dinoflagellates
3. Diatoms
4. Brown algae

Q. If feeding efficiency of one species might be reduced due to the interfering and inhibitory presence of the other species, even if resources (food and space) are abundant then it is called

1. Competitive exclusion
2. Resource partitioning
3. Interference competition
4. Competitive release

Q. Name the type of interaction wherein a particular type of bird lays eggs into the nest of another bird (host) and allows the host to incubate them.

1. Amensalism
2. Mutualism
3. Brood parasitism
4. Commensalism

Q. In which of the following interactions both partners are adversely affected ?

1. Mutualism
2. Predation
3. Parasitism
4. Competition

Q. In a competitive interaction, both the species benefit from each other.

1. True
2. False

Q. An interaction in population within the members of the same species is termed as whereas the interaction between two different species is termed as .

1. interspecific
2. intraspecific
3. protocooperation
4. predation