2. What two substances make the backbone of the DNA molecule?

Which monomer makes up a polypeptide?

What is phylum? Explain.

Name 2 reasons that viruses are not considered living things

Which planet rotates most slowly about it axis

What should be included in the thesis of a descriptive essay? A. a clear and dominant impression B. a position on a controversial issue C. a roadmap of a logical argument D. a factual sequential statement

The gametophytes of an unknown plant are contained within the sporophyte, and the plant produces separate male and female gametophytes. Which the following is the best conclusion about the life cycle of this plant? a.

How many variables should you have in a control experiment?

How is science different from other subjects such as art or history

What happens if you don't have enough carbohydrates?

Describe the movement of "air" into and out of the respiratory system. Be sure to include the following structures (larynx, trachea, bronchi, bronchioles, and alveoli) while being specific about whether it is mainly oxygen or carbon dioxide moving