Which two substances are among the four major types of organic compounds made by living things?
D A. Proteins
O B. Potassium
Oc. Carbohydrates
D. Water

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

Which of the following typically characterizes a tropical rainforests

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology