Biology Review EOC 12C

What type of organisms can obtain energy directly from any of the other organisms in an ecosystem?

• Herbivore

• Decomposer

• Producer

• Carnivore

The diagram below represents a food web.

Which organisms are correctly paired with their nutritional roles?

• hawk - decomposer; insect-eating bird - parasite

• mouse - autotroph; flower seed - heterotroph

• mountain lion - predator; bark beetle - herbivore

• grasshoper - carnivore; grass - autotroph

Which organisms in the food web below would be considered both a primary consumer and a secondary consumer?

• rabbit

• grasshopper

• mouse

• spider

Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism's life processes, and the rest is-

• used in reproduction.

• stored as body tissue.

• stored as fat.

• eliminated as heat.

What percentage of energy is passed from the producers to the secondary consumers?

• 0.001%

• 1%

• 10%

• What 100%

Which of the following is a long-term effect on the removal of the redfish from the ecosystem represented by the food web above?

• The osprey population will increase.

• The amphipod population will increase.

• The clam worm population will increase,

• The phytoplankton population will increase.

The diagram represents a pyramid of biomass in an aquatic environment. Which statement best explains why mass decreases from one level to the next in this pyramid?

• Organisms decay at each level, and thus less mass can be supported at higher levels.

• Energy is lost to the environment at each level, so less mass can be supported at higher levels.

• When organisms die at higher levels, their remains sink to the lower levels, increasing the mass at lower levels.

• More organisms die at higher levels than that at lower levels, resulting in less mass at higher levels.