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Chapter 54: Q54-2TYU (page 1235)

The principle of competitive exclusion states that

(A) two species cannot coexist in the same habitat.

(B) competition between two species always causes extinction or emigration of one species.

(C) two species that have exactly the same niche cannot coexist in a community.

(D) two species will stop reproducing until one species leaves the habitat.

Short Answer

Expert verified

  1. The statement 鈥渢wo species cannot coexist in the same habitat鈥� isfalse.

  2. The statement 鈥渃ompetition between two species always causes extinction or emigration of one species鈥� isfalse.

  3. The statement 鈥渢wo species that have exactly the same niche cannot coexist in a community鈥� is true.

  4. The statement 鈥渢wo species will stop reproducing until one species leaves the habitat鈥� is false.

Step by step solution

01

Competitive exclusion

When two species have similar niches and needs, they both precisely compete for limited resources and cannot coexist, with one species dominating advantage over the other. It is called competitive exclusion.

02

Explanation of option ‘(A)’

The field of ecology defines habitat as a natural environment where organisms survive due to the availability of water, food, and shelter.

Thus, the species exists in a single habitat to form a complex food web for energy transfer.

Therefore, the given statement is false.

03

Explanation of option ‘(B)’

In ecology, when no living member of the last surviving species is found where they used to exist, it is called extinction.

Thus, the competing species coexist in a community for the same prey.

Therefore, the given statement is false.

04

Explanation of option ‘(C)’

The components of the three distinct ecosystems (geographical area where living species interacts) components are habitats, niches, and competitive exclusion principle.

Thus, the two animals with the same role in an ecosystem cannot coexist.

Therefore, the given statement is true.

05

Explanation of option ‘(D)’

In reproductive biology, the term reproduction represents life鈥檚 fundamental process that determines offspring production from their parents.

Thus, the species reproduction takes place under any circumstances.

Therefore, the given statement is false.

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Most popular questions from this chapter

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Predators that are keystone species can maintain species diversity in a community if they

(A) competitively exclude other predators.

(B) prey on the community鈥檚 dominant species.

(C) reduce the number of disruptions in the community.

(D) prey only on the least abundant species in the community.
See all solutions

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