Sem1 Exam_CPBIO_The Biosphere

All of life on earth exists in __________.

• a biome

• an ecosystem

• ecology

• the biosphere

Which term describes a group of different species that live together in a defined area?

• a biosphere

• a community

• an ecosystem

• a population

Which of these includes both living and nonliving things together?

• community

• ecosystem

• organism

• population

Which of these is NOT an abiotic factor?

• plant

• soil composition

• temperature

• wind speed

What are primary producers in an ecosystem?

• They are at the top of the food chain.

• They break down dead matter.

• They consume other organisms for energy.

• They create their own food using sunlight.

How do all consumers obtain their energy?

• They do not need energy.

• They get it from other living things.

• They make it from sunlight.

• They produce it from chemosynthesis.

The series of steps in which a large fish eats a small fish that has eaten algae is a __________.

• food chain

• food web

• pyramid of biomass

• pyramid of numbers

How much energy typically passes from one level in a food chain to the next?

• 10%

• 50%

• 75%

• 100%

What is one way water enters the atmosphere in the water cycle?

• condensation

• denitrification

• precipitation

• transpiration

What is the importance of the main nutrient cycles?

• to carry out life functions

• to provide drinking water

• to regulate climate

• to supply fresh air