Ecosystems Vocabulary Ch 4

Carnivores

• eat plants

• eat animals

• do photosynthesis

limiting nutrient

• limits productivity

• supply is limited

• needed for an organism to survive

• All these are true

DNA and RNA both need nutrients from the (2 correct answers)

• phosphorus cycle

• nitrogen cycle

• water cycle

• potassium cycle

Fertilizers contain which nutrients?

• nitrogen

• phosphorus

• potassium

• all these nutrients

Which processes are part of the nitrogen cycle?

• nitrogen fixation

• nitrates

• nitrites

• ammonia

What 2 processes take carbon dioxide (CO2) out of the air?

• dissolving in the ocean

• cellular respiration

• photosynthesis

• decomposition

Some bacteria obtain energy by converting nitrates (NO3-) into N2 gas in a process called

• denitrification

• photosynthesis

• nitrification

• cellular respiration

Which is NOT the same?

• Autotroph

• Consumer

• Primary Producer

• Grass

Chemotrophs use ___________ for their energy.

• the sun

• chemicals

Which process can happen in the dark?

• photosynthesis

• chemosynthesis