BIO Category 5 Review

What is the difference between an autotroph and a heterotroph?

• Heterotrophs are producers and autotrohps are consumers
• Heterotrophs cannot be changed and autotrophs can change themselves
• Heterotrophs are consumers and autotrophs are producers
• Heterotrophs cannot move and autotrophs can move

Without plants, the amount of carbon dioxide in the atmosphere would...

• Increase
• Decrease
• Stay the same
• Plants have nothing to do with carbon dioxide

Dead plants and animals in the soil are broken down into humus by the efforts of ......

• bacteria only in the soil.

• Viruses in the soil.

• Fungi and viruses in the soil.

• bacteria and fungi in the soil.

What is formed during primary succession that doesn't need to be formed during secondary succession?

• pioneer species
• soil
• climax community
• lichens

the first organisms that appear in an ecological community

• climax community

• primary succession 
• secondary succession
• pioneer speciles

Epiphytes are a class of plants that grow in the crooks of tree branches. They simply use the tree branches as a way to be higher - closer to the sunlight needed for photosynthesis. The trees aren't affected by this relationship. This is an example of which type of symbiosis?

• Commensalism

• Mutualism

• Parasitism

• Amensalism

If a prey animal's population goes down, what will happen to the predator's population?

• it will stay the same

• it will go up

• they will go extinct

• it will go down because they have less to eat

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• It shows how sunlight flows within an ecosystem.

• They show the direction the energy is flowing between organisms.

• They represent how water is transferred within a habitat.

An organism that obtains energy by consuming plants and animals.

• Omnivores
• Carnivores
• Herbivores
• Humans 

All of the following are examples of environmental changes that can be caused by humans except - 

• clearing land for housing developments
• pesticides
• volcanic eruption
• pollution