You are studying a fossilized primate skull and notice that the foramen magnum is located at the center
of the base of the skull. You conclude that:a.
the skull belonged to a knuckle walker.
b. the skull belonged to a quadruped.
c. the skull belonged to a bipedal primate.
d. the skull belonged to a brachiator.
e. the skull belonged to a gibbon.
C
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This diatom is in the same lineage as _____
1.heterotrophic water molds
2.multicellular brown algae
3.chlorophyte algae
4.trypanosomes
The prebiotic soup hypothesis proposes that organic molecules formed from cracks in the ocean floor
______________ Indicate whether the statement is true or false.
Changes in what frequencies are at the core of how evolution occurs?
What will be an ideal response?
The antibiotic cycloheximide binds to the 60S subunit of the ribosome as shown in Figure 20.2. The effect is to
a. Prevent mRNA-ribosome binding in eukaryotes. b. Prevent peptide bond formation in prokaryotes. c. Prevent polypeptide elongation in eukaryotes. d. Prevent transcription in prokaryotes. e. Prevent ribosome formation in bacteria.