Select and answer either question 1 or question 2. 1) What are cyclins? Which is more likely to produce cyclins at a faster rate- the cells in a
newborn or cells in an adult? Explain.

2. how are embryonic Stem cells and adult stem cells alike? different? What are some pottenial benefits and tissue associated with stem cell research?

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.

What materials must dams have to produce electricity, and what must occur?