Darwin's hypothesis of common ancestry with branching descent explains:
a. the hierarchical patterns of similarity ob-served in nature. c. the history and pattern of life's diversity.
b. varieties nested within species nesting within genera. d. All of the above.
D
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A Gram-positive bacterium is characterized by the ____
a. presence of a thin peptidoglycan cell wall b. presence of a thick peptidoglycan cell wall c. absence of a cell wall d. presence of an outer membrane e. absence of ribosomes
In seed plants, which develops into a pollen grain?
a. megaspore b. microsporangium c. microspore d. female gametophyte e. megasporangium
Which of the following are late successional species?
A) trees B) grass C) weeds D) forbs
This protein or protein complex functions in the cell to stop cell division if the cell has experienced extensive DNA damage:
A. Condensin B. p53 C. APC/C D. FtsZ