Provides a mechanism by which the chromosome number may be kept the same from one generation to another. a. mitosis b. meiosis c. natural selection d. evolution

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

What is the following best defines climate?

You see a white marker with an orange circle and black lettering. what does this marker tell you