29. The four main types of macromolecules found in organisms are carbohydrates, lipids, nucleic acids, and A. starches
B. fatty acids
C. monosaccharides
D. proteins

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Approximately what wavelength of light is best absorbed by chlorophyll a

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic.