The first organisms on Earth were able to transform the carbon dioxide in the air into what essential element needed for modern life?

A. Hydrogen

B. Helium

C. Nitrogen

D. Oxygen

A variety of mice can have either gray fur (G) or white (g). Which words describe the genotype of a mouse that inherits two of the alleles for gray fur

Which six elements provide most of the mass of the human body?

What are the main functions of polysacchrides in plants

DNA is located in the of the cell. DNA contains segments called that code for a particular trait. DNA is made of that form.

Why does the weather become cool & clear after a thunderstorm?

1. As an object moves towards another object the sound waves bunch up. True Or False 2. As an object moves toward another object the sound waves have lower frequency. True or False. 3.

Do we classify viruses as living

What caused the evolution of antibiotic-resistant bacteria?

In the metabolism of amino acids for energy, what is the fate of the amino group? a. excreted as urea b. burned for energy c. stored in the liver d. converted to glucose

Which function of the nephron includes the movement of fluid from the blood into bowman's capsule?