What percentage of the light energy that is absorbed by photosynthetic algae from the sun is available as food for herbivores in the oceans?
a. 60 percent
b. 2 percent
c. 25 percent
d. 15 percent

Which element provides strength to the exoskeleton of clams and oysters

Enzymes are proteins that speed up reactions by providing an additional energy source supplying additional molecules for the reaction removing inhibitors that slow down reactions lowering the amount of energy required

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated