Question

1. pick one food chain (with at least 3 organisms) and draw a trophic pyramid below. include the organism name, trophic level name and number, and the percentage of energy available at each level

Explanation:

Step1: Choose a Food Chain

Let's pick a simple food chain: Grass (Producer) → Rabbit (Primary Consumer) → Fox (Secondary Consumer).

Step2: Identify Trophic Levels

• Trophic Level 1 (Producer): Grass. Energy available: 100% (assuming this is the starting energy from the sun converted via photosynthesis).
• Trophic Level 2 (Primary Consumer): Rabbit. Energy available: 10% of the previous level (due to the 10% energy transfer rule in ecosystems), so \( 100\% \times 0.1 = 10\% \).
• Trophic Level 3 (Secondary Consumer): Fox. Energy available: 10% of the primary consumer's energy, so \( 10\% \times 0.1 = 1\% \).

Step3: Draw the Trophic Pyramid

Trophic Level	Organism	Energy Percentage
2 (Primary Consumer)	Rabbit	10%
1 (Producer)	Grass	100%

Visually, the pyramid will have a wide base (Grass, 100%) tapering up to Rabbit (10%) and then Fox (1%).

Answer:

Food Chain: Grass → Rabbit → Fox
Trophic Pyramid (as table above) with Grass (Trophic Level 1, 100% energy), Rabbit (Trophic Level 2, 10% energy), Fox (Trophic Level 3, 1% energy)