Identify the force used on your arm when you walk a dog on a leash and it tries to chase something Friction
Gravity
Strong pull
Weak push

What must happen before meiosis can begin? a. four gametes must be produced b. the four tetrads must be pulled apart c. dna doubles and produces sister chromatids d. the cell membrane pinches together

Look at the photo of the leaf. which term best describes this leaf?

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming