Question

1. what is the basis of all energy in the ecosystem?

a. the grasses
b. the bee
c. the water
d. the sun

1. where do all humans get their food from? choose all that are correct.

a. animals
b. sun
c. plants
d. air

1. why do organisms need energy that they make from food?

a. growth
b. movement
c. cell repair
d. reproduction
e. all of the above

1. what happens to the amount of energy being passed on in the food chain as shown in the energy pyramid?

Explanation:

• Question 31: In an ecosystem, the sun is the ultimate source of energy. Producers (like plants) use sunlight for photosynthesis to convert light energy into chemical energy. This energy then flows through the food chain (primary consumers, secondary consumers, tertiary consumers). Grasses (A) are producers but they get energy from the sun. A bee (B) is a consumer. Water (C) is not the energy source.
• Question 32: Humans are heterotrophs. They can get food from animals (A, e.g., meat, dairy) and plants (C, e.g., fruits, vegetables). The sun (B) is the energy source for producers but not a direct food source for humans. Air (D) provides gases like oxygen for respiration but not food.
• Question 33: Organisms need energy for multiple life - processes. Growth (A) requires energy for cell division and synthesis of new materials. Movement (B) (e.g., muscle contraction) needs energy. Cell repair (C) (synthesis of new cell components) and reproduction (D) (production of gametes, gestation in some cases) also require energy. So all of the above (E) is correct.

Answer:

1. D. The sun
2. A. Animals, C. Plants
3. E. All of the above