March CRT review

Food chains and webs typically start with which kind of organism?

• Producers
• Decomposer
• Primary Consumer
• Secondary Consumer

Which of the following would be the Apex Predator?

• Hammerhead Shark
• Octopus
• Phytoplankton
• Orca

What may happen if the snowshoe hare was 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 dies due to no food source.

How much energy is passed from one trophic level to the next?

• .1%
• 1%
• 10%
• 100%

If there is 2000 kcal (units) of energy at the producer level in this particular ecosystem, how many kcal of energy will be available for hawk?

• 2000 kcal
• 200 kcal
• 20 kcal
• 2 kcal

How does the energy flow in an energy pyramid, food chain, and web?

• From producer up to apex predator
• From highest level consumer down to autotroph

Which of the following is an example of a producer?

• Lion
• Deer
• Grass
• Eagle

Invasive species alter the ecosystem by __________in number quickly,this leads to _____ food for the native species.

• increasing, less
• declining, more

What is an invasive species?

• A native (naturally found) species which are added to an area.
• A non-native (not naturally found) species added to an area.
• A keystone species in an environment
• none of the above

Why do the populations of invasive species grow so quickly?

• invasive species require more energy than other organisms
• invasive species are prey to many animals.
• invasive species have no natural predators.
• invasive species keep the ecosystems in equilibrium.