AP BIOLOGY

Detailed explanation-1: -Therefore if plants (present at producers level) produces 100 units of energy, 10% of it will be transferred to primary consumers (10 units of energy) and 10% of the subsequent energy is transferred to secondary consumers (1 unit of energy).

Detailed explanation-2: -Secondary consumers receive 10% of the energy available at the primary consumer level (1% of the original energy). Tertiary consumers receive 10% of the energy available at the secondary level (0.1% of the original energy).

Detailed explanation-3: -The second level, primary consumers, has about 10% of the energy available at the producer level. The third level, secondary consumers, has about 1% of the energy available at the producers level.

Detailed explanation-4: -Secondary consumers are carnivores that feed on primary consumers; and tertiary consumers are carnivores that eat secondary consumers. In rare instances, an ecosystem may have an additional trophic level composed of quaternary consumers-carnivores that consume tertiary consumers.

Detailed explanation-5: -Level 1: producers Trophic level 1 is comprised of primary producers. They are found at the base of an ecological pyramid. A food chain would start as well at trophic level 1. The trophic level 1 is occupied by plants and algae.