Penicillin is made from:

fungi

bacteria

viruses

protozoa

After the middle ages the astronomer who changed the model of the solar system by placing the sun at its center was

Two ways that carbon can get from the ocean to the lithosphere

According to the nebular hypothesis, when did nuclear fusion begin?

How could you add decomposers to the food chain?

What type of membrane junction would you expect to be most plentiful in the bladder? why?

Can energy be transferred from animal to animal

The more stomata the more water loss?

Why does it take a long time to develop a new variety of tomato? A. Changes in traits happen gradually, over many generations. B. Many plants resist change. C. Tomatoes cannot acquire new traits. D. A species cannot change over time.

Select the one true statement. Vacuoles store nutrients, water, and waste in animal cells. Plant cells can have chloroplasts but do not have a cell wall.

Using water more effectively A. Protects the environment B. Causes the loss of natural pollution filters C. Increases with contamination D. All of the above