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Chapter 54: Q54-6TYU (page 1235)

Food chains are sometimes short because

(A) only a single species of herbivore feeds on each plant species.

(B) local extinction of a species causes the extinction of the other species in its food chain.

(C) most of the energy in a trophic level is lost as energy passes to the next higher level.

(D) most producers are inedible.

Short Answer

Expert verified

  1. The statement 鈥渙nly a single species of herbivore feeds on each plant species鈥� isfalse.

  2. The statement 鈥渓ocal extinction of a species causes the extinction of the other species in its food chain鈥� isfalse.

  3. The statement 鈥渕ost of the energy in a trophic level is lost as energy passes to the next higher level鈥� is true.

  4. The statement 鈥渕ost producers are inedible鈥� is false.

Step by step solution

01

Food chain

In ecology, the chain of passing energy sequentially from organisms at one trophic level to another is called the food chain.

02

Explanation of option ‘(A)’

In environmental science, the term herbivore represents living organisms, such as animals whose only diet is plant-based food.

Thus, more energy availability is there in the food chain for herbivores.

Therefore, the given statement is false.

03

Explanation of option ‘(B)’

The extinction in the food chain shows the explosion of the prey population due to the extinction of predatory species.

Thus, the species extinction in a food chain shows the predator dependence, not the amount of energy transferred.

Therefore, the given statement is false.

04

Explanation of option ‘(C)’

When biological organisms occupy a lower to a higher position in a food chain, it is called a trophic level.

Thus, the exact amount of energy is not transferred among the different trophic levels; less energy is available to higher animals.

Therefore, the given statement is true.

05

Explanation of option ‘(D)’

Examples of food chain producers are phytoplankton, green plants, and small shrubs.

Thus, the inedible producers in the food chain are associated with food quality.

Therefore, the given statement is false.

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Most popular questions from this chapter

According to the principle of competitive exclusion, what outcome is expected when two species with identical niches compete for a resource? Why?

Why do high and low levels of disturbance usually reduce species diversity? Why does an intermediate level of disturbance promote species diversity?

In the Chesapeake Bay estuary, the blue crab is an omnivore that eats eelgrass and other primary producers as well as clams. It is also a cannibal. In turn, the crabs are eaten by humans and by the endangered Kemp鈥檚 Ridley sea turtle. Based on this information, draw a food web that includes the blue crab. Assuming that the top-down model holds for this system, describe what would happen to the abundance of eelgrass if humans stopped eating blue crabs.

Based on MacArthur and Wilson's Island equilibrium model, how would you expect the richness of birds on islands to compare with the richness of snakes and lizards? Explain.

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.
See all solutions

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