Midterm Review 2024

Front

What is a secondary consumer?

Back

A secondary consumer is an organism that eats primary consumers (herbivores) in a food chain.

Front

What happens to biodiversity when a keystone species is removed from an ecosystem?

Back

Biodiversity goes down.

Front

What is the initial effect of introducing a new predator to an ecosystem?

Back

It increases competition among existing predators for food.

Front

List the 8 characteristics of life.

Back

1. Made of at least 1 cell 2. Ability to reproduce 3. Have a metabolism 4. Homeostasis 5. Contain DNA 6. Response to stimuli 7. Grow and develop 8. Evolve/change over time.

Front

What is a community in ecological terms?

Back

A community is different populations living and interacting with each other in the same area.

Front

Define a keystone species.

Back

A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance.

Front

What is the role of producers in an ecosystem?

Back

Producers are organisms that create their own food through photosynthesis or chemosynthesis, forming the base of the food chain.

Front

Explain the concept of homeostasis.

Back

Homeostasis is the ability of an organism to maintain a stable internal environment despite changes in external conditions.

Front

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

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their physical environment.