Unit #3 TEST Practice

An example of succession is

• wolves of Yellowstone changing the flow of a river

• shrubs replacing annual plants in an area

• a caterpillar turning into a butterfly

• a tapeworm growing in the stomach

Why are invasive species harmful to native species

• they all have poison in fangs

• they reproduce rapidly with no true predators

• they do not reproduce

• they do not have leaves

The pioneer species for secondary succession is

• lichens

• moss

• annual plants (grasses)

• trees

The pioneer species for primary succession is

• lichens

• annual plants (grasses)

• shrubs

• shade intolerant trees

The main difference between primary and secondary succession is

• primary starts with bare rock; secondary starts with soil

• primary starts with soil; secondary starts with bare rock

• there are no differences

What is the order for primary succession plants?

• lichens, moss, tree, shrub, birds

• lichens, shrubs, moss, grass, trees

• lichens, moss, grasses, shrubs, trees

• trees, shrubs, moss, lichens, grasses

After a natural disaster such as a flood, a new ecosystem will be established. . .

• in the form of dessert

• different than the previous

• similar to the previous one

Lichens are made up of what two organisms? CHECK ALL THAT APPY

• fungus

• annual grass

• algae

• shrub

The wolves of Yellowstone are called ____. Without them the ecosystem would collapse.

• endemic species

• keystone species

• indicator species

The sea otter eats sea urchins. The sea urchins eat kelp. What happens to kelp if the otter is removed.

• It will increase

• It will decrease

• It will stay the same