Question

which of the following best describes the role of producers in an ecosystem?
a. they prey on primary consumers
b. they create their own food through photosynthesis
c. they consume other organisms for energy
d. they break down dead organic matter

what term best describes the role of sea otters in kelp forest ecosystems?
a. predators
b. primary producers
c. keystone species
d. decomposers

what is a food web?
a. a network of interconnected food chains depicting multiple feeding relationships
b. a diagram showing only the producers in an ecosystem
c. a representation of only herbivores in an ecosystem
d. a linear sequence of energy flow

which of the following best describes an apex predator?
a. organism that decomposes organic matter
b. primary consumer in an ecosystem
c. species that feed on primary producers
d. top predator in a food chain with no natural predators

which level in a food chain represents organisms that prey on primary consumers?
a. primary producers
b. secondary consumers
c. quaternary consumers
d. tertiary consumers

what is the primary function of decomposers in an ecosystem?
a. to convert sunlight into energy
b. to compete with producers for resources
c. to prey on herbivores
d. to break down dead organic matter and return nutrients to the soil

in an ecosystem, which organisms convert sunlight into energy - rich organic compounds?
a. decomposers

Explanation:

• For the first question, producers create food via photosynthesis.
• For the second, sea otters are keystone species in kelp forests.
• A food web is a network of food chains (third question).
• Apex predators are top - of - the - chain with no natural predators (fourth).
• Secondary consumers prey on primary consumers (fifth).
• Decomposers break down dead matter (sixth).

Answer:

1. b. They create their own food through photosynthesis
2. c. Keystone species
3. a. A network of interconnected food chains depicting multiple feeding relationships
4. d. Top predator in a food chain with no natural predators
5. b. Secondary consumers
6. d. To break down dead organic matter and return nutrients to the soil