Which of the following best describes Growing Degree Day total? A. A measure of the amount of heat a plant is exposed to over a single day
B. A measure of the amount of heat needed to encourage plant growth
C. A measure of the amount of heat tolerance a plant demonstrates
D. A measure of the amount of heat a plant must experience before reaching maturity

The relationship between intron and exon

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred