Which is the correct sequence of events in the nitrogen cycle?
a)
soil nitrogen-animals-plants-fun
atmospheric nitrogen--bacteria- plants-animals
soil nitrogen atmospheric nitrogen-plants-animal
atmospheric nitrogen- plants-animals-soil nitrogen

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees

Look at the photo of the leaf, which term best describes this leaf ? a-simple. b-parallel. c-lobed. d-tooth.