Exploring Marine Food Webs

Which of the following best describes the role of phytoplankton in the marine food web?

• They are primary consumers that feed on zooplankton.

• They are primary producers that convert sunlight into energy through photosynthesis.

• They are secondary consumers that eat small fish.

• They are decomposers that break down dead organic matter.

In a marine food web, which of the following organisms is most likely to be a secondary consumer?

• Phytoplankton

• Zooplankton

• Small fish

• Sharks

What is the primary source of energy for the marine food web?

• Chemical energy from hydrothermal vents

• Sunlight

• Heat from ocean currents

• Nutrients from river runoff

Which of the following statements about marine food webs is true?

• Energy flow in a marine food web is unidirectional, from consumers to producers.

• Marine food webs are independent of terrestrial food webs.

• Marine food webs are complex and interconnected, with multiple pathways for energy flow.

• Marine food webs are simple and linear, with a single pathway for energy flow.

How do zooplankton contribute to the marine food web?

• They are primary producers that create energy from sunlight.

• They are primary consumers that feed on phytoplankton.

• They are decomposers that recycle nutrients.

• They are top predators that control fish populations.

Which of the following is an example of a tertiary consumer in a marine food web?

• Phytoplankton

• Zooplankton

• Small fish

• Large predatory fish

What role do decomposers play in the marine food web?

• They produce energy from sunlight.

• They consume primary producers.

• They break down dead organisms and recycle nutrients.

• They are top predators in the food web.

Which of the following best explains the concept of trophic levels in a marine food web?

• Trophic levels represent the number of organisms in a food web.

• Trophic levels indicate the position of an organism in the food chain.

• Trophic levels are determined by the size of the organism.

• Trophic levels are unrelated to energy flow in the ecosystem.

In a marine food web, what is the relationship between primary producers and primary consumers?

• Primary producers eat primary consumers.

• Primary consumers eat primary producers.

• Primary producers and primary consumers compete for the same resources.

• Primary producers and primary consumers are the same organisms.

Which of the following factors can affect the dynamics of a marine food web?

• Changes in water temperature

• Availability of nutrients

• Introduction of invasive species

• All of the above