EVERYDAY SCIENCE

SCIENCE

ECOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Most of the energy available to organisms in the second trophic level (primary consumers) is used by organisms for
A
transfer to the next trophic level.
B
respiration, heat, movement, and reproduction.
C
producing inorganic chemical compounds
D
performing photosynthesis.
Explanation: 

Detailed explanation-1: -According to Lindeman’s 10% law, only 10% of energy is transferred to next level. If energy available at first trophic level is 10, 000 Joules, then at second trophic level energy available will be 10% of 10, 000 which equals to 1000 Joules.

Detailed explanation-2: -On average, only about 10% of the energy stored as biomass in one trophic level-e.g., primary producers-gets stored as biomass in the next trophic level-e.g., primary consumers.

Detailed explanation-3: -Within all biological communities, energy at each trophic level is lost in the form of heat (as much as 80 to 90 percent), as organisms expend energy for metabolic processes such as staying warm and digesting food (see biosphere: The organism and the environment: Resources of the biosphere: The flow of energy).

Detailed explanation-4: -Level 2: primary consumers The next trophic level in a food chain or an ecological pyramid is trophic level 2. In this level, the organisms occupying this level feed on the primary producers and are called primary consumers. Animals that feed on plant materials are called herbivores.

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