Why is a food chain a more limited representation of the flow of energy through an ecosystem than a food web?
a. a food chain shows multiple pathways of energy.
b. a food chain has limitations with the organisms involved.
c. a food chain shows all the organisms.
d. a food chain shows only a single pathway of energy.

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Which of the following shows the results that you would get if you tested beef using the four tests in the gizmo

Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.