Caused by natural sources, such as dus and smoke, and human sources, such as gas powered cars and trucks

What is taking place in the G1 phases? A. DNA replication B. division of the cytoplasm C. sexual reproduction D. cell growth E. division of the nucleus

Fructose and glucose are examples of

Benthos are organisms that live

Fossils on one continent may be similar to fossils on another continent. This observation supports which theory?

Where would gullies be more likely to form: A field with plowed soil and no plants or a field covered with thick grass? Explain

The immediate energy system (ATP-PC) relies on: a. the reactions of glycolysis b. oxygen availability in the immediate cellular environment c. the high-energy phosphates stored in muscle cells d. the oxidation of lactate

The central Dogma states that the genetic code is passed from one molecule of DNA to another molecule of DNA through what?

Made when sediments fill in a cavity made when an object decayed and the sediments harden into rock

The lemming is a small mammals with a very high daily energy expenditure for its size. Based on what you learned in the panda case study, what would you predict about the lemming?

You started out as a single cell and are now made of over 200,000 different types of cells. explain how this happens.