What is one way to that changes can occur in a DNA sequence

Why are cancer cells or abnormal cells used in tissue cultures

Extinction occurs when the environment changes and

Explain in your own words how temperature of the environment has affected the hair coloring of the Himalayan rabbit.

Why is cytoplasm like jelly

What role does cellular respiration play in the water cycle

If you looked at heart cells, would you expect to see a lot of mitochondria or only a few? Why?

Which of the below is TRUE regarding desertification? a. It is likely to happen in any type of climate b. It produces rich desert ecosystems c. It is not usually impacted by droughts or climate change d.

What is considered a pre existing medical condition?

Humans do not eat the algae directly from the ocean, so how can we still be affected by it?

In an effort to control the ongoing cholera epidemic affecting Haiti, health officials are considering the use of cholera vaccines. One difficulty they are facing is the limited vaccine supply.