Which activities occur during prophase II? Check all that apply.

* DNA condenses to form chromosomes.
* Each chromosome pairs up with its mate.
* Spindle fibers form.
* Chromosomes move to the opposite end of the cell.
* The nuclear envelope disappears.

Which identifies the main purpose of biological taxonomy?

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

In which state was more than 100 billion tons of coal mined in 2005?