QUICK TEST ENDS IN 4 MINUTES
Name 2 cellular structures (organelles) that plant cells have, but animal cells don’t. B. Then, choose one and explain why an animal cell does not need it. *

Plants have chloroplast and cell wall

Explanation:

Plants have chloroplast because chloroplast have green color pigment called chlorophyll which is required by plants for photosynthesis. Animals do not have chloroplast because they do not perform photosynthesis.  

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.