Question

part c: true/false (7 questions, 3 points each = 21 points total)

1. steroids are composed of amino acids. (t/f)
2. the carrying capacity is the maximum population size an environment can sustain. (t/f)
3. phospholipids have hydrophobic tails and hydrophilic heads. (t/f)
4. the carbon cycle relies on photosynthesis and respiration. (t/f)
5. unsaturated fats are usually solid at room temperature. (t/f)
6. proteins provide the main source of quick energy for organisms. (t/f)
7. communities include multiple species interacting in the same area. (t/f)

part d: food web (25 points in total)
draw a food web that describes the energy flow through an ecosystem. make sure to include at least one example for each: producer, primary consumer, secondary consumer, tertiary consumer (hint: the food web starts with the sun)

Explanation:

1. Steroids are lipid - based molecules, not composed of amino acids.
2. The carrying capacity is indeed the maximum population size an environment can sustain over a long - term.
3. Phospholipids have a hydrophilic head and a hydrophobic tail, which is fundamental to cell membrane structure.
4. Photosynthesis takes in carbon dioxide and respiration releases it, forming a key part of the carbon cycle.
5. Unsaturated fats are usually liquid at room temperature, while saturated fats are solid.
6. Carbohydrates provide the main source of quick energy for organisms, not proteins.
7. A community is defined as multiple species interacting in the same area.

Answer:

1. F
2. T
3. T
4. T
5. F
6. F
7. T