biodiversity/invasive species

Which of the following situations is MOST HARMFUL to an ecosystem's food web or food chain?

• introduction of a similar producer
• loss of one of the top consumers
• increase in the population of producers
• disease killing the producers

In a particular habitat, owls eat mice and mice eat grass. If the owl population suddenly grows, then most likely

• the number of mice will decrease and the amount of grass will not change.
• the number of mice will increase and the amount of grass will increase.
• the number of mice will increase and the amount of grass will not change.
• the number of mice will decrease and the amount of grass will increase.

All living and nonliving things that surround an animal are part of its

• food chain
• life cycle
• atmosphere
• habitat

Deer usually travel in groups of 2-3 sometimes more. How does staying in a group increase one deer’s chance to pass on his genes to the next generation?

• It increases the deer’s chances of survival.
• It protects the deer from the cold.
• It allows the deer to eat.
• It gives the deer time to think.

Which habitat exhibits the greatest biodiversity?

• A habitat with 15 different species with about 300 individuals each
• A habitat with 10 different species with about 75 individuals each
• A habitat with 4 different species with about 150 individuals each
• A habitat with only one species with about 2000 individual

Currently sharks are on a rapid decline due to overfishing. If sharks go extinct will this affect the biodiversity of the ocean?

• No, sharks are not important.
• No, sharks will only affect the seal populations.
• Yes, it will disrupt the entire food chain in the ocean.
• Yes, but only a little.

How can humans best help an endangered species avoid extinction?

• they can feed the animals
• they can put the animals in a zoo
• they can protect the animal’s habitat
• they can take the animal to new habitats

What does the root "diversity" mean...

• living

• nonliving

• toxic

• variety

How do biodiversity and stability work together?

• The lower the biodiversity the greater the stability of an ecosystem.

• The higher the biodiversity, the less stable the ecosystem

• The higher the biodiversity, the greater the stability of the ecosystem.

• Biodiversity has nothing to do with ecosystem stability.

High biodiversity is 

• having a lot of the same organism.
• having a few of the same organism.
• having a lot of variety of different organisms.
• only having one of each organism.