2. explain how a breeder might produce a new breed of dog
with long ears and a snub nose and how this new breed is
evidence of evolution

Which organelle breaks down sugar molecules that supply energy to the cell ?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?