This diagram shows how oxygen is cycled through an ecosystem. which part of this diagram does not contain an element from the periodic table that is essential to life?

a. sugars being formed in the tree's leaves
b. sunlight rays hitting the earth's surface
c. the rhino breathing in oxygen
d. the tree taking in carbon dioxide

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

How does a gymnosperm prevent itself from pollinating the same tree

Astudent analyzed ears of corn that demonstrated two traits in the f2 kernels, purple or white colors and smooth on wrinkled shapes. a tabulation of 135 individual kernels gave the following results: purple and smooth = 75 white and smooth = 28 purple and wrinkled = 24 white and wrinkled = 8 what would be the only phenotype present in the f1 ger