Ozone is located in the upper atmosphere and shields the earth from harmful ultraviolet light rays from the sun, which cause skin cancers. What is the chemical formula of ozone? A) O2 B) O3 Eliminate C) NO3 D) NO2

Hydrolysis of carbohydrates you eat begin in your mouth as you chew. How do you think this process might be affected in a person's salivary glands were unable to produce saliva which is mostly composed of water?

Protists and bacteria are grouped into different domains because

During which period did mammals first appear? a. Pleistocene b. Carboniferous c. Cretaceous d. Jurassic

How an alpine glacier can change the topography of a mountainous area

Which of the following statements is true? Question 5 options: a. A promoter determines whether a gene is expressed. b. An expressed gene is turned off. c. Proteins that bind to regulatory sites on DNA determine whether a gene is expressed. d.

Describe what it means for a field of study to be considered a science

Why are organisms that have organs classified as more complex than organisms without organs?

What is the final energy source that the muscles need in order to move? fat, sugar, ATP, or glycogen

What provides clues about the ocean and climate including the type of marine life presented? A. the density, temp, and salinity of ocean water. B. the volume, density, and salinity of the ocean water C. the mass, volume, and density in ocean water D.

Cancer is a disease that involves uncontrolled cell division caused by a genetic mutation. It can occur in almost any region in the body. So, cancer is essentially uncontrolled (a. Meiosis b. Mitosis c. Regeneration) of (a. Enbryonic stem cells b.