Unit 6 Test

This tree has leaves that fall off yearly, they have broad leaves that change color in the fall and spread their seeds using flowers. An example of this would be an Oak tree. What type of tree has these leaves?

• Coniferous tree
• Deciduous tree

This tree has needles instead of leaves, they don't change color in the fall, and they use cones instead of flowers to spread their seeds. What type of tree has these leaves?

• Coniferous tree
• Deciduous tree

The first species to appear in an area. An example of this would be a lichen.

• discovering species

• pioneer species

• new species

• colonizing species

After a landslide removes all the plants, but leaves the soil behind, what type of succession might occur?

• Primary

• Secondary

• Teritary

The food web below shows some of the feeding relationships among organisms in Arctic waters.

Which organism would be least affected by overfishing for cod in Arctic waters?

• seals

• shrimp

• baleen whales

• toothed whales

What causes competition to occur in an environment?

• Good conditions make resources plentiful.

• Organisms struggle for a limited resource.

• Members of a population have different roles.

Which part of the diagram represents the intertidal zone?

• Zone 1

• Zone 2

• Zone 3

• Zone 4

A disease reduces the number of young salmon in a river. Which population will MOST likely increase as a result?

• trout and eagle

• algae and trout

• sculpin and algae

An increase in the amount of nutrients in an aquatic ecosystem

• Eutrophication
• Zootrophication
• Overfishing
• Swamping

An area in which fresh water from a river mixes with salt water from the ocean

• Mangrove Swamp
• Estuary
• Marshes
• Wetland