2. What is the original source of almost all the energy in most ecosystems? (a) Carbohydrates
(b)Sunlight
(c) Water
(d)Carbon
3. Organisms need nutrients in order to
(a) Utilize hydrogen and oxygen
(b)Carry out essential life functions
(c) Recycle chemical compounds
(d)Carry out nitrogen fixation
4. Where in the cell are proteins synthesized?
(a) Mitochondria
(b)Vacuole
(c) Ribosomes
(d)Nucleus
5. The food producer within the plant cell uses energy from the sun and converts carbon dioxide and water into sugars. This sub-cellular structure is called the: (a) Vacuole
(b)Mitochondria
(c) Chloroplast