Chapter 5: Interactions in Ecosystems

​ (a)   is all the living and nonliving things in an area.

• Ecosystem
• Biosphere
• Habitat
• Population

A group of organisms of one species that live in an area at the same time is called a ​ (a)  

• population
• community
• biosphere
• ecosystem

A ​ (a)   is made up of all the populations in an area.

• community
• population
• biomass
• niche

Biologists have divided the world into regions called ​ (a)  

• biomes
• habitats
• ecosystems
• population

The role that an organism has in an ecosystem is called ​ (a)  

• niche
• habitat
• ecosystem
• biosphere

​ (a)   rainforests have the largest number of species.

• Tropical
• Desert
• Arctic
• Tundra

(True or False) The temperature in desert biomes is always extremely hot.

(a)  

• True

• False
• Maybe

In a​ (a)   trees lose their leaves.

• deciduous forest
• tundra
• tropical rainforest
• boreal forests

A limiting factor in the tundra is Temperature.

(True or False) A species’ population will never decrease if its habitat change.

(a)  

• True

• False
• Maybe