What types of organisms have endoskeleton​

The instructions for making proteins come originally from

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity