AP BIOLOGY

Detailed explanation-1: -Calculate the percent of energy that is transferred from the first trophic level to the second trophic level. Divide energy from trophic level one and multiply by 100. This amount is the percent of energy transferred. Remember to add a percent sign.

Detailed explanation-2: -If a grassland ecosystem has 10, 000 kilocalories (kcal) of energy concentrated in vegetation, only about 1, 000 kcal will be transferred to primary consumers, and very little (only 10 kcal) will make it to the tertiary level.

Detailed explanation-3: -If 10, 000 joules of energy is available to the producer, then only 1000 joules of energy will be available to the primary consumer and only 100 joules of energy will be available to the secondary consumer. The energy available with the tertiary consumer will be 10 joules of energy.

Detailed explanation-4: -Explanation: B If 100, 000 kcal are available at the first trophic level (the primary producers), then 10, 000 kcal are available to the second trophic level, 1, 000 kcal to the third trophic level, and 100 kcal to the fourth trophic level.