There is a shadow under a tree. Which form of energy must be present for the shadow to occur?
A.)Heat
B.)Light
C.)Sound
D.)Mechanical

Follow the directions for self-quiz question 8, draw it, by labeling the appropriate structures with these terms, drawing lines or brackets as needed: chromosome (label as replicated or unreplicated), centromere, kinetochore, sister chromatids, nonsister chromatids, homologous pair, homologs, chiasma, sister chromatid, cohesion