Question

answer the following questions about the food web below.1. which organism(s) are producers?2. which organism(s) are autotrophs?3. which organism(s) are herbivores?4. which organism(s) are carnivores?5. which organism(s) are omnivores?6. which type of heterotroph is missing from this food web?7. which organism would be at the top of the trophic pyramid?8. what does the arrow going from the grass to the grasshopper mean? why do the arrows only go in one direction?9. choose one food chain from the food web above. draw it in the space below. then create a trophic pyramid of it. be sure to label the trophic level number, name, and amount of energy available at each level.10. come up with your own food chain below. include at least 3 organisms, one of which should be a human. then create a trophic pyramid. be sure to label the trophic level number, name, and amount of energy available at each level.

Explanation:

1. Producers make their own food via photosynthesis; grass and water lily do this.
2. Autotrophs = producers, so same as question 1.
3. Herbivores eat only producers; caterpillar, grasshopper fit.
4. Carnivores eat only other animals; owl, lizard fit.
5. Omnivores eat both plants and animals; mouse eats plants and insects.
6. Decomposers break down dead matter, not present here.
7. Top trophic organisms have no predators; the owl is at the top.
8. Arrows show energy flow: grass → grasshopper means grasshopper gets energy by eating grass. Energy flows one way because most energy is lost as heat at each trophic level, can't be reused.
9. Example food chain: Grass → Grasshopper → Owl. Trophic pyramid: Level 1 (Producer, Grass): 10,000 kcal; Level 2 (Primary Consumer, Grasshopper): 1,000 kcal; Level 3 (Tertiary Consumer, Owl): 10 kcal (10% energy transfer per level).
10. Example food chain: Corn → Cow → Human. Trophic pyramid: Level 1 (Producer, Corn): 10,000 kcal; Level 2 (Primary Consumer, Cow): 1,000 kcal; Level 3 (Secondary Consumer, Human): 100 kcal.

Answer:

1. Grass, Water Lily
2. Grass, Water Lily
3. Caterpillar, Grasshopper
4. Owl, Lizard
5. Mouse
6. Decomposers
7. Owl
8. The arrow means energy (and nutrients) flows from the grass to the grasshopper (the grasshopper consumes the grass for energy). Arrows only go one direction because energy transfer in ecosystems is unidirectional: most energy is lost as heat at each trophic level, so it cannot cycle back to producers.
9. Example Food Chain: $\text{Grass}

ightarrow \text{Grasshopper}
ightarrow \text{Owl}$
Trophic Pyramid:

Trophic Level Number	Trophic Level Name	Energy Available
2	Primary Consumer (Grasshopper)	1,000 kcal
3	Tertiary Consumer (Owl)	10 kcal

1. Example Food Chain: $\text{Corn}

ightarrow \text{Cow}
ightarrow \text{Human}$
Trophic Pyramid:

Trophic Level Number	Trophic Level Name	Energy Available
2	Primary Consumer (Cow)	1,000 kcal
3	Secondary Consumer (Human)	100 kcal