Which component do animals add to the atmosphere when they breathe?

When plants make their own food, they add what gas to the atmosphere?

Plants are important to all animals, even animals that eat only meat, because plants provide a resource animals need for -

Plants and animals that live on land exchange carbon dioxide and oxygen through the –

What gas would eventually decrease if a large number of plants in a forest habitat were removed?

Plants play a role in the carbon dioxide and oxygen cycle when they absorb -

Carbon dioxide is a gas found in the Earth’s atmosphere. Animals expel carbon dioxide into the atmosphere as part of -

What resource, given off by plants as their contribution to the carbon dioxide-oxygen cycle, is necessary for the survival of animals?

Plants are important to the survival of animals because plants –

Huge areas of the Amazon Rainforest are being cut down. What effect could this have on the carbon-dioxide and oxygen cycle if the removal of so many plants and trees continues?

The carbon dioxide-oxygen cycle is important to animals because it provides –

Which of the following could increase the amount of oxygen in the air?

To give up one thing and replace it with another

A gas released into the air by plants

A gas released into the air by animals

A set of events that occurs over and over again

The process by which plants make their own sugar for food

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