There are two bright stars in a constellation. One of the stars appears red and the other star appears blue. Which of the following is the best explanation for the difference in the stars' color? The blue star must be moving toward Earth and the red star away from Earth.

The red star must be moving toward Earth and the blue star away from Earth.

The red star must have a greater surface temperature compared to the blue star.

The blue star must have a greater surface temperature compared to the red star.

What does it mean for a cell membrane to be selectively permable

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.