Which are the four most abundant elements in living cells ?
A. carbon, oxygen, nitrogen, sulfur B. carbon, oxygen, hydrogen, nitrogen C. carbon, oxygen, sulfur, phosphorus D. carbon, sulfur, hydrogen, magnesium
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A. carbon, oxygen, nitrogen, sulfur B. carbon, oxygen, hydrogen, nitrogen C. carbon, oxygen, sulfur, phosphorus D. carbon, sulfur, hydrogen, magnesium
A. Scientific law B. Theory C. Data D. Deduction
A. Water B. Glucose C. Oxygen D. Sodium chloride
A. Experimental inquiry B. Esthetic preference C. Philosophical ideas D. Imaginations
A. Hydrolysis B. Pinocytosis C. Dehydration synthesis D. Active transport
A. Biome B. Phyletic lineage C. Community D. Population
A. Diffusion B. Passive transport C. Osmosis D. Active transport
A. Older sediment layers have equal amount of these radioactive isotopes as that of the young ones B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones. C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones. D. Older sediment layers …
A. Concentration of water molecules inside and outside the cell B. Concentration of enzymes on either side of the cell membrane C. Rate of molecular motion on either side of the cell membrane D. None of these
A. Environmental biologist B. Paleontologist C. Marine biologist D. Social biologist