72. its Not all consumed matter is incorporated into the biomass of a heterotrop

Question

72. its Not all consumed matter is incorporated into the biomass of a heterotroph. A heterotroph's growth is determined by secondary production, which equals ingestion minus . a. net; chemosynthesis and perspiration b. net; egestion and respiration c. net; egestion and perspiration d. gross; egestion and respiration 73. Which of the following represents the correct ranking (from highest to lowest) in terms of the organism's expected production efficiency? a. Mouse > fox > beetle b. Fox > mouse > beetle c. Beetle > mouse > fox d. Beetle >fox>mouse 74. What is the difference between bioaccumulation and biomagnification? A. Only animals lower on the food chain bioaccumulate, whereas all organisms can biomagnify. B. Bioaccumulation is the buildup of substances within one organism, whereas biomagnification involves these substances moving up the food chain as one organism eats another. C. Bioaccumulation is mainly fat soluble chemicals; biomagnification involves mostly water soluble chemicals. D. Bioaccumulation is mainly water soluble chemicals; biomagnification involves mostly fat soluble chemicals. 75. In bottom-up control, energy flow through the ecosystem is determined primarily by the a. supply of resources limiting NPP b. production efficiencies of herbivores c. assimilation efficiencies of herbivores d. abundance of carnivores. edatory wasp that feeds exclusively on herbivorous ants would be an example of a(n)_and part of the trophic level. a. herbivore; second b. omnivore; third c. carnivore; second d. carnivore; third

Explanation / Answer

72. Option B is correct.

Net secondary production = Ingestion - (Egestion + Respiration)

The net secondary production is available for the organism for its growth.

73. Option C is correct.

As we move up in a food chain, only 10% of the energy is transmitted.

74. Option A is correct.

Bioaccumulation: Toxic chemicals enter into the food chain

Biomagnification: Toxic chemicals accumulate from one trophic level to the other.

75. Option A is correct.

In bottom-up control, energy flow through the ecosystem is determined primarily by the supply of resources limiting the net primary production.

76. Option B is correct.

A predatory wasp is a carnivore and part of the third trophic level.

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