The probable transitional link between the hominoids and the monkeys is
A. Homo habilis.
B. Australopithecus afarensis.
C. Australopithecus africanus.
D. Proconsul.
E. Homo erectus.
Answer: D
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Available evidence is consistent with the proposal that prion diseases are caused by infectious proteins.
Answer the following statement true (T) or false (F)
A bowl of sugar water is very stable. However, cells can rapidly break down sugar into carbon dioxide and water. What is the best explanation for this observation?
A. Glucose becomes more chemically reactive inside a cell. B. The water is activated by the presence of living cells. C. Enzymes in the cell catalyze the breakdown of glucose. D. Living cells make the water warmer, speeding up the reaction. E. Breakdown of glucose has a negative delta G outside of cells, but a positive delta G inside cells. F. Cells use energy to break down glucose.
Each enzyme has a particular substrate because enzymes
What will be an ideal response?
Most plant viruses have ___________ as their genetic material.
A. DNA B. nulceotides C. proteins D. RNA