Life Science Review

What is a tertiary consumer?

• An organism that eats primary producers.

• An organism that eats secondary consumers.

• An organism that decomposes organic material.

• An organism that feeds on tertiary producers.

What is the significance of producers in an ecosystem?

• They convert solar energy into chemical energy through photosynthesis.

• They decompose organic matter and recycle nutrients.

• They consume other organisms for energy.

• They regulate the population of herbivores.

What is a primary consumer?

• An organism that eats producers, such as plants.

• An organism that produces its own food through photosynthesis.

• An organism that decomposes dead matter.

• An organism that feeds on primary consumers.

_____________ refers to all the different kinds of living organisms within a given area.

• Ecosystem

• Biodiversity

• Habitat

• Population

Define a food chain.

• A sequence that shows how energy and nutrients flow from one organism to another.

• A list of all the organisms in an ecosystem.

• A diagram that represents the physical structure of a habitat.

• A method of classifying organisms based on their diet.

Algae --> Shrimp --> Snapper --> Shark. If there are 25 calories available to the shrimp, how many calories will make it to the sharks?

• 0.25

• 5

• 10

• 1

What role do decomposers play in an ecosystem?

• They produce energy through photosynthesis.

• They break down dead organisms and recycle nutrients back into the soil.

• They compete with plants for sunlight and water.

• They provide shelter for various organisms.

What is the difference between a food chain and a food web?

• A food chain is a linear sequence of energy flow, while a food web is a complex network of interconnected food chains.

• A food chain includes multiple species, whereas a food web consists of only one species.

• A food chain is a complex network of interconnected food webs, while a food web is a simple linear sequence.

• A food chain represents only herbivores, while a food web includes both herbivores and carnivores.

What is the role of sunlight in photosynthesis?

• It provides the energy needed for plants to convert carbon dioxide and water into glucose.

• It helps in the absorption of nutrients from the soil.

• It acts as a catalyst for the chemical reactions in plants.

• It prevents the plants from overheating during the day.

What factor would directly limit the number of robins and squirrels that could live in a park?

• Number of trees.

• Amount of rainfall.

• Presence of predators.

• Size of the park.