Unit 10 Review

What would be true if the rabbit population increased?

• The bacteria population will decrease

• The hawk population would increase

• There may be increases in wolves, hawks, and snakes.

• Grasshopper populations would increase

What could be changed about the food web to make it more accurate?

• Remove bacteria because they are not in the forest

• Change arrows to go in opposite direction

• Show arrows going from all organisms to fungi and bacteria

• Draw arrows from the Sun to all organisms

Prairie dogs live in complex tunnels underground and compete with other herbivores in the ecosystem. Which is the abiotic factor in this situation?

• Prairie dogs

• Underground habitat

• Other herbivores

• Grasses

Which abiotic factor(s) do plants compete for in order to make their own food?

• water ONLY

• sunlight ONLY

• wind ONLY

• water AND sunlight

Which is NOT an example of an abiotic factor?

• Sunlight

• Wind

• Fungi

• Water from a stream

How are phytoplankton similar to small trees?

• Both grow in soil

• Both conduct photosynthesis

• Both are about the same size

• Both are at the top of the food chain

Which is MOST likely to happen if a large number of phytoplankton are killed from runoff entering the ocean?

• The number of zooplankton would increase

• The number of salmon would probably decrease

• The number of porpoises would probably stay the same

• The Sun would probably not emit as much energy

What type of land does Primary Succession occur?

• Rock

• Soil

• Water

What type of land does Secondary Succession occur?

• Rock

• Soil

• Water

What is the FIRST species to arrive into an ecosystem called?

• Pioneer species

• Organic matter

• Succession