When a comet nears the sun, what happens to the nucleus?

1. It becomes solid.

2. It becomes visible.

3. It becomes gas.

4. It disappears.

If an organism has high biological fitness in one environment, does that mean it would also have high biological fitness in another environment? Why or why not

How is the speed of a rivers flow determined?

How can nanotechnology be used to treat cancer patients?

Which of the following describes the lining of the channel within maltoporin? a. A series of aromatic side chains arrange in a helical pattern matching the relative curvature of the protein backbone, thus provided little restriction to transport. b.

Bluebirds and blue jays, two bird species live in a small wooded area. The blue jays are very aggressive and eventually take over the nests of the bluebirds. This is an example of interspecific A) competition. B) control. C) exclusion. D) predation.

During transcription in eukaryotes, a type of RNA polymerase called RNA polymerase II moves along the template strand of the DNA in the 3'→5' direction.

A plant species live in an area with limited sunlight

Which statement is true of the nucleus of a cell

Until about 200 million years ago, Earth's continents were joined as a single land mass called A. Asia Minor. B. Pangaea. C. Glossopteris. D. Cynognathus.

How many cells does a fish have? Do they maintain homeostasis?