Ecosystems

During photosynthesis, plants give off

• carbon dioxide

• water vapor

• nitrogen

• oxgen

During cellular respiration, organisms give off

• nitrogen

• oxygen

• carbon dioxide

• water vapor

What is the source of energy for most plants?

• sunlight

• clouds

• water

• animals

The shortest food chains consist of

• a consumer and a decomposer

• two producers

• two consumers

• a producer and a decomposer

Which describes both a food chain and a food web?

• both contain only consumers

• both begin with a producer

• both contain multiple ways that energy flows

• both must include a carnivore

The relationship between an owl and a mouse is an example of

• competition

• symbiosis

• predator and prey

• producer and consumer

Which event would cause an ecosystem to change quickly?

• a climate change

• an earthquake

• a lake drying up

• a rock becoming soil

Nonnative animal populations can grow rapidly in a new ecosystem because

• predators in the ecosystem are not used to hunting them

• They have no competition for resources in the ecosystem

• Nonnative species are always at the top of food chains

• They are producers

A group of the same type of organisms living in the same place at the same time.

• threatened species
• populations
• community
• limiting factor

Tags

NGSS.MS-LS2-1

All of the populations that live in one area together

• limiting factors

• populations

• community

• speed limit

Tags

NGSS.3-LS2-1