What gives the gem amethyst is purplish color?

a. Quartz

b. Iron

c. Oxygen

d. Titanium

What process occurs after DNA has been replicated?

On a hot summer day, the water in an outdoor swimming pool feels much warmer in the afternoon than in the morning. Which is a valid claim about how the particles in the water change from the morning to the afternoon? A. They move slower. B.

The article "Autoimmune Diseases Stopped in Mice" refers to medication that suppresses the immune system. Why does this medication increase the risk of certain cancers?

Why kind of pigment is clorophyl b?

Where is chlorophyll located in plants?

What job does each organelle do in a cell?

Which of the following statements is true of an object composed of a single cell? It could be considered living only if it has some of the other characteristics of life. It is a living thing. It is not a living thing. It could become a living thing.

If night blindness is a recessive trait, what should the phenotype of the couple's fourth child be?

What's the jet stream and why is it important

a person who is more than 2o percent heavier than the average person of the same sex and height is said to be