Earth is the only planet with a wide variety of life because of it's? A. Size and shape. B. Closeness to the sun. C. Moderate temperature and liquid water.

Neurotransmitters are considered the basic working units of the brain. Group of answer choices True False

Although the science of heredity establish by Mendel has been greatly modified over the last 160 years, Mendel's work provided the basis for many biotechnology applications used today. They include ALL BUT ONE of those listed here.

How does the destruction of forest contribute to levels of atmospheric carbon?

Which populations are most at risk for developing hiv? (select all that apply.) a. those who are sexually active b. those who are cognitively impaired c. those older than the age of 50 years d. women?

Write a brief description of the Skeletal System.

Which of the following best describes a noncontact force? A. a force that is able to act at a distance B. a force that must be physically touching the object it acts on C. a force that always pulls objects backward D.

Which type of energy used on earth comes directly from the sun

Aldosterone is secreted in response to changes in: select one: a. blood potassium levels. b. blood calcium levels. c. blood pressure. d. body temperature. e. blood glucose levels

How does a mutation in dna cause a disease that affects multiple organs?

Dylan is on a strict vegan diet. He doesn't consume meat, fish, eggs, or dairy products. Which nutrient is difficult to obtain naturally from a vegan diet