3rd 9 Weeks Warm Up Review

Which organism do the owl and the weasel compete for in the food web?

• Hawk
• Spider
• Grasshopper
• Shrew

About how much percent of energy is passed on from one organism to to the next on an energy pyramid?

• 100 percent of all energy gets passed
• 45 percent of all energy gets passed
• 10 percent of all energy gets passed
• 0 percent of all energy gets passed

What is the sun's role in the energy pyramid?

• to produce chemical energy for the ecosystem.
• to provide radiant energy for producers to convert to chemical energy. 
• to start the energy flow of the ecosystem. 
• to provide mechanical energy for producers to convert to chemical energy. 

What is natural selection?

• When reproduction occurs and mutations happen.

• When a offspring has the traits from its parents.

• When an organism is able to camoflauge in its environment.

• the process whereby organisms that are better adapted to their environment tend to survive and reproduce more offspring.

In a cold environment what would be some adaptive traits? Sellect all that apply.

• thick blubber

• thick fur

• thin fur

• strong muscles

What is an adaptive trait?

• A genetic trait that helps an organism to maximize its survival and reproduction ability

• A trait that makes an animal strong

• a trait that makes an animal weak

• a poisonus plant

What must organisms do when an environment changes?

• Adapt

• Camoflauge

• become common

• fight

Birds have unique beaks adapted for their survival?

• true
• false

Which biome is more biodiverse?

• Desert
• Sand
• Tundra
• Rainforest

Biodiversity is important to keep an area (biome) healthy. In this example "Food Web A" is sustainable. Why is sustainability important for an ecosystem in "Food Web A".

• If one organism is removed the food web can still operate (work) with little or no negative effect.

• If an organism is removed the food web will collapse and will affect the environment.