22. Why does DNA have to replicate? 23. What do enzymes have the ability to do?
Fill in the table below with information from the video.
Enzyme
Enzyme Nickname
24. Helicase
Functions
25. DNA Polymerase
26. Primase
27. Ligase
28. What is the name of the part of DNA where DNA replication starts?
29. What binds to the DNA strands to keep them separated?
30. What is the role of topoisomerase?
31. In which direction does the DNA Polymerase build a new strand?
32. Why is the new strand named the lagging strand?
33. What could happen is DNA Polymerase matches the wrong DNA bases?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

(me out over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences: -the fossil record shows that different types of organisms have existed at different times in earth's history. -many organisms have similar body structures that seem to be adapted to different ways of living in their environment. -organisms of different species often share similarities in stages of embryonic development. -many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins. -often, the extent of two species' similarities can be predicted from their geographic closeness to each other. -a great deal of change has been observed among species that have experienced strong selective pressures through many generations. scientists have carefully considered and rigorously tested the observations listed above. when scientists offer a of these observations, they are making 1.) testable explanation, deductive explanation 2.) scientific interference, scientific law