Ch. 2 Biology Test (2022)

Atmospheric nitrogen can be made useable for plants & animals by:

• oxygen

• bacteria

• fungi

• the carbon cycle

On average, only __% of energy will move to the next higher trophic level.

• 1

• 10

• 100

• 15

In which symbiotic relationship is one organism helped and the other is neither helped nor harmed?

• mutualism

• parasitism

• commensalism

• none of these

A group of organisms that can interbred and produce viable (fertile) offspring.

(Hint: they can have babies & their babies can have babies)

• community

• ecosystem

• niche

• species

The ultimate source of ENERGY for all ecosystems and nutrient cycles.

• producers

• consumers

• sunlight

• water

The role or function of an organism in its ecosystem.

• community

• biosphere

• ecology

• niche

An organism that gets all of its energy & nutrients from dead plants & animals.

• omnivore

• carnivore

• herbivore

• detritivore

How do animals obtain most of their nutrients needed for survival?

• from bacteria

• directly from the air

• by consuming (eating) food

• directly from the soil

Arrows in a food web or food chain represent how energy moves through an ecosystem.

• TRUE

• FALSE

How does energy move through the biosphere?

• in a one-way flow

• it cycles through it