In developing his classification, Linnaeus focused on
a. chromosomal anatomy.
b. morphology.
c. physiology.
d. behavioral traits.
e. molecular sequences.
B
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Neoteny is invoked to help explain:
A. how relatively little genetic change could lead to the significant differences we see between ourselves and chimps. B. how our large brains evolved. C. why selection favored relative hairlessness in humans compared to our great ape-like ancestors. D. skin color variation among human populations. E. None of the above.
What is a difference between a Tn and IS element?
A) Tn elements can carry antibiotic resistance genes. B) IS elements carry a transposase gene. C) Tn elements integrate into plasmids and genomes. D) IS elements integrate into plasmids and genomes.
In a woody stem, the vascular cambium is located directly below the outer bark
1.True
2.False
What is the difference between an electrically neutral atom and an ion?
a. An ion has an unequal number of protons and electrons, while a neutral atom has an equal number. b. An ion has an equal number of protons and electrons, while an atom has an unequal number. c. An atom has an unequal number of neutrons and protons, while an ion has an equal number. d. An atom has its electrons in orbitals, while an ion has its electrons in its nucleus. e. An atom must have an equal number of neutrons and electrons, while an ion does not.