Biology Air Practice

If an ecosystem lost a keystone species, which outcome would be expected?

• A new keystone species would replace the old keystone species.

• The oxygen supply in the ecosystem would be depleted.

• The population numbers of other species would change dramatically.

• The temperature of the ecosystem would increase.

Tags

NGSS.MS-LS2-4

Which of the following situations contributes to the sustainability of an ecosystem

• Increase in biodiversity

• Decrease in biodiversity

• Extinction of a population from the ecosystem

• Removal of many populations of organisms

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Complete this statement. The more diverse an ecosystem is ----

• the more threatened its populations are

• the more similar the species will be

• the more stable it is

• the few varieties of species are present

Tags

NGSS.MS-LS2-5

Which of the following processes is primarily responsible for the exchange of gases in the lungs?

• Osmosis

• Diffusion

• Active transport

• Filtration

What is the main function of alveoli in the respiratory system?

• To filter out dust particles

• To exchange oxygen and carbon dioxide

• To produce mucus

• To warm the air

Which part of the plant is primarily responsible for gas exchange?

• Roots

• Stem

• Leaves

• Flowers

Tags

NGSS.MS-LS1-6

What is the role of hemoglobin in the respiratory system?

• To transport oxygen

• To digest food

• To fight infections

• To produce energy

Which of the following best describes the process of photosynthesis?

• Conversion of glucose into energy

• Conversion of light energy into chemical energy

• Conversion of oxygen into carbon dioxide

• Conversion of water into oxygen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does the diaphragm contribute to breathing?

• By contracting to increase lung volume

• By relaxing to decrease lung volume

• By filtering air

• By producing sound

What is the primary component of air that is essential for human respiration?

• Nitrogen

• Oxygen

• Carbon dioxide

• Argon