The major difference between oxygen and ozone is:

1. the number of atoms in a molecule

2. the kind of atoms they are made of

3. the color of the gas

4 ... one is a gas and the other is a liquid

Select the correct answer. Which of the following is a chemical reaction?

Give an example of how the body might respond to internal stimuli caused by stress

What do snakes and giraffes have in common? (key shared characteristics)

What is a mutagen?

In which direction does water move across the membrane up or down

Eukaryotic cells have many different specialized structures that are involved in making, organizing, and delivering a protein molecule. Describe the four organelles that are involved and the sequence of events of this process.

What do scientists call an orderly pattern of change over time? A. homeostasis B. ecological succession C. food web D. an ecosystem

When erosion occurs here in Southeast Michigan, what layers are eroded away first?

Which structures regulate water loss and gas exchange in the leaves of plants

Name an organism in each domain: archaea, bacteria, eukarya