Cell walls of bacteria (domain Bacteria) usually consist of _____________, a network of polysaccharide molecules connected by polypeptide cross-links.
Fill in the blank(s) with the appropriate word(s).
peptidoglycan
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Wilcove's experimental design included
a. three forest types. b. multiple nests per habitat type. c. height from ground. d. three forest types and multiple nests per forest type. e. three forest types, multiple nests per forest type and height from ground.
Animals obtain minerals such as phosphorus
a. primarily dissolved in drinking water. b. by inhalation. c. by eating herbivores. d. by metabolic conversion of other minerals. e. by none of these.
Which of the following is human's closest living relative?
A) Gibbons B) Gorillas C) Chimpanzees D) Baboons
Until which period of time did scientists think that molecules of life could only be produced by living entities?
A) early 1500s B) late 1500s C) early 1600s D) late 1600s E) early 1800s