Food Webs Are Typically Arranged into Trophic Levels with

question 9

Multiple Choice

Food webs are typically arranged into trophic levels with

• A)primary producers at the bottom,herbivores in the middle,and carnivores at the top.
• B)herbivores at the bottom,carnivores in the middle,and primary producers at the top.
• C)carnivores at the bottom,herbivores in the middle,and primary producers at the top.
• D)primary producers at the bottom,carnivores in the middle,and herbivores at the top.

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Definitions:

Afterload

The pressure the heart must work against to eject blood during systole.

Extracellular

Located or occurring outside of a cell or cells, often referring to the fluid, substances, or cellular components in the space outside cells.

Heart Rate

The number of heartbeats per unit of time, usually measured in beats per minute (bpm).

Hyperpolarized

The state of a cell membrane when its potential becomes more negative than its normal resting potential.