The first eukaryotic cells probably arose about ________ billion years ago.
A. 2.2
B. 4.5
C. 2.5
D. 3.5
Answer: A
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The increased concentration of toxins as they move up through the food chain is called ____
a. biological magnification b. eutrophication c. biological accumulation d. deposition e. desertification
The change in one population driven by a change in an associated population is called
A) assortative evolution. B) genetic drift. C) coevolution. D) random mutation. E) fitness.
Which of the following is NOT a cytopathic effect of viruses?
A) cell death B) host cells fusing to form multinucleated syncytia C) inclusion bodies forming in the cytoplasm or nucleus D) increased cell growth E) toxin production
Answer the following questions true (T) or false (F)
1. Water is an organic molecule. 2. Hydroxyl groups are functional groups found on amino acids. 3. Amino acids contain both amino and carboxyl functional groups.