About 43% of blood consists of red blood cells.

true or false

Which exocrine structure is involved in the digestion of fat?

Insects often act as pollinators for plants. In turn, plants provide these insects with food. What kind of a relationship exists between the insects and the plants?

Which sustainable practice is paired correctly with its impact on the environment? A) using bamboo results in an increased use of forest trees B) practicing contour plowing results in a need for more land C) setting irrigation systems to run longer

The reproductive process that creates genetic variety in a population is

The nucleotide of DNA is one large molecule composed of three smaller molecules. Which of the following sets of molecules bond together to form a nucleotide? A. a purine, a pyrimidine, and a five-carbon sugar B. adenine, thymine, and cytosine C.

What's the purpose of the pH scale

4. The Sun and stars do not move. True False

In which part of a coal-burning power plant is the coal actually burned? boiler condenser pulverizer

What type of cell does mitosis produce?

What do ribosomes do? a. making ATP energy b. making proteins