Lesson 8: Biodiversity QUIZ

Removing an ordinary species (example: bird) from a food web typically results in...

• Increased population of the ordinary species' prey

• Increased population of the ordinary species' predators

• Plant overgrowth

• The whole system to collapse

High biodiversity is a sign of a healthy ecosystem.

• True

• False

If the grasshopper were to be removed completely from the food web, how would this affect the biodiversity of the ecosystem?

• increases biodiversity

• decreases biodiversity

• biodiversity remains the same

• we would need to know how the grasshopper was removed

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. 

What may be the immediate effect of the snowshoe hare being removed from the food web pictured?

• The insects in the habitat would increase.

• The shrew population would decrease due to being only hawk food source.

• The willow tree population would decrease.

• Foxes would die due to loss of all food sources.

The biodiversity level of a rainforest ecosystem includes all the

• plants, animals, and insects

• rocks, animals, and insects

• dirt/soil, animals, and insects

• water, animals, and insects

This picture is a great example of ____________ biodiversity.

• high

• moderate

• low

• there is no way to know without counting.

Which community has a greater biodiversity?

• Community A

• Community B

• They both have equal biodiversity.

What would happen if the grizzly bear decreased in this food web?

• There would be less red tail hawks.

• There would be more deer.

• There would be a decrease in chipmunks.

• There would be increase in butterflys.

Based on the graph shown, how can you tell sea otters are a keystone species (a species other species largely depend on in an ecosystem)?

• as the sea otter population decreases, biodiversity increases

• as sea otter population decreases, biodiversity decreases

• changes in the sea otter population have little effect on biodiversity 

• the sea otter population dereases due to the presence of urchins