A fossil is found to have a 14c level of 79.0% compared to living organisms. how old is the fossil?

Which of the following are found in DNA and RNA? A. Phosphate groups, guanine, and cytosine B. deoxyribose, phosphate groups, guanine C. Phosphate groups, guanine, thymine

Do plant cells require hypertonic, hypotonic, or isotonic solutes?

One major biotic factor that effects the health of coral reefs is

What of the following statements is true about catalysts? A. Catalysts slow down the rate of chemical reactions B. All catalysts are enzymes C. Catalysts are used up during a chemical reaction D.

The biological classification of organisms is called taxonomy. Based on your own investigation, discuss the importance of taxonomy in biological?

Why might a water table drop

How did the 1898 discovery of blood types affect society?

Which of the following is a feeding source for fens? aquifers dexfoliants exfoliants nitrates

What system includes oceans, lakes, rivers, and groundwater? a. geosphere b. hydrosphere c. atmosphere d. biosphere

Fungal spores a. are only asexually produced. b. cannot be seen in a light microscope. c. are used to identify fungi. d. are produced by molds but not by yeasts. e. are only produced under harmful environmental conditions