Unit 3: Homeostasis

Front

What is a keystone species?

Back

A keystone species is one that has a large impact on its ecosystem despite being small in number. Its presence or absence can significantly affect the structure and health of the environment.

Front

What happens to carbon when humans burn fossil fuels?

Back

Most of the carbon quickly enters the atmosphere as carbon dioxide.

Front

What is mutualism?

Back

Mutualism is a type of symbiotic relationship where both species benefit from the interaction. An example is flowers and pollinating insects.

Front

What happens to predator numbers when prey numbers are low?

Back

Predator numbers decrease when prey numbers are low due to lack of food.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the warming of the atmosphere caused by the trapping of heat that is radiated from the Earth's surface.

Front

Define homeostasis.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the ecosystem.

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 example of a predator-prey relationship?

Back

An example of a predator-prey relationship is a lion hunting a zebra.

Front

What is biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species.