Which of the following is an organic molecule
a. iron oxide
b. oxygen gas
c. water
d. sucrose

Which could be a pathway of food through an ecosystem

In the united states there are many types of rabbits. four different species have four different ranges or habitats. in which range would developing white fur in winter most likely not be an advantage?

Mendel used over 28,000 pea plants in his experiment. how does this large sample size make his results more reliable? (i'm not sure about this one)