In Figure 23-2, the pair of organisms that have the most recent ancestor is:
a. 2 and 4.
b. 6 and 4.
c. 4 and 5.
d. 2 and 3.
e. 1 and 2.
D
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Which of the following was derived from an ancestral cyanobacterium?
A) chloroplast B) mitochondrion C) flagella D) mitosome
Arrange the following genetic terms in order from smallest to largest
A. gene; DNA strand; chromosome; genome B. genome; gene; chromosome; DNA strand C. DNA strand; chromosome; Gene; Genome D. DNA strand; Gene; Genome; Chromosome E. Gene; Chromosome; DNA strand; Genome
As temperatures increase during seasonal fluctuations in marine environments,
A) both species richness and species dominance increase. B) species richness increases and species dominance decreases. C) species richness decreases and species dominance increases. D) both species richness and species dominance decrease.
The strongest chemical bonds are
A. Van der Waal forces. B. hydrophobic interactions. C. covalent bonds. D. hydrogen bonds. E. ionic bonds.