Identify which of the following scenarios is most probable for the evolution of members of genus Homo.
A. Australopithecus afarensis gave rise to Homo habilis who gave rise to Homo ergaster who gave rise to Homo erectus
B. Ardipithecus ramidis gave rise to Homo habilis who gave rise to Homo ergaster who gave rise to Homo erectus
C. Australopithecus afarensis gave rise to Homo habilis who gave rise to Homo sapiens who gave rise to Homo erectus
D. Australopithecus afarensis gave rise to Homo erectus who gave rise to Homo ergaster who gave rise to Homo habilis
Answer: A
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What is the ecological explanation for why sunflowers and grassy weeds thrive in your untended, sunny garden, but mosses, which require shade, do not?
A. Communities depend on interactions among organisms. B. Communities depend on their physical environment. C. Disturbance can modify community composition. D. All of the responses are correct. E. None of the responses is correct.
How can databases of variants be used to help pinpoint a disease-causing mutation? (Select all that apply.)
A) Polymorphisms found in individuals that do not have the syndrome can be eliminated from consideration. B) Common polymorphisms are unlikely to cause a rare disease and they can be eliminated from consideration. C) Some amino acids are conserved in genes across species; mutations in conserved amino acids are not likely to cause disease. D) Mutations that occur between genes are most likely to cause a genetic disease.
Sarcoplasm is what?
What will be an ideal response?
The "backbone" of a nucleic acid molecule is made of
A) lipids. B) NAD+ and FAD. C) amino acids. D) ATP molecules. E) sugar and phosphate groups.