Which two types of structures make up the earthworm's heart? a)specialized cells b)organ systems c)tissues d)organisms

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

Which is one example of a phenotypic change that is not genetic