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 has limitations with the organisms involved.
b.
a food chain shows only a single pathway of energy.
c.
a food chain shows multiple pathways of energy.
d.
a food chain shows all the organisms.

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..

Match each symbol with its description.

If a cell is placed into a hypertonic environment, what will happen to it ? a)it will shrink or shrivel b)nothing c)it will burst d) it will expand or enlarge