What happens to a cell in the s phase?
the nuclear envelope develops around each set of chromosomes.
dna replicates to form two copies of chromosomes.
sister chromatids separate out from the chromosomes.

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Why are some places regularly warmer or cooler than others in a given month