Viruses have both an intracellular and an extracellular form
Indicate whether the statement is true or false.
Answer: TRUE
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In California, a species of salamanders were geographically separated over time. The group that lived in southern California relied heavily on large gold blotches on their skin that helped to camouflage them from predators. The group that lived along the coast adopted a color pattern that mimicked a poisonous, colorful newt common to that area. Instead of being camouflaged, these salamanders
advertised their colors. What type of selection process has occurred over time? A. theoretical selection B. artificial selection C. experimental selection D. natural selection
Isotopes of atoms ____
a. have the same number of neutrons but a different number of protons b. behave the same chemically and physically but differ biologically from other isotopes c. are the same physically and biologically but differ from other isotopes chemically d. have the same number of protons but a different number of neutrons e. are produced when atoms lose electrons
If another C were inserted next to the fourth base
from the left (C) in this mRNA, what would be the amino acid sequence of the resulting polypeptide? AUGCGUCCA a. leucine – glutamine – valine b. methionine – leucine – serine c. serine – threonine – STOP d. methionine – proline – serine e. none of these
The proteome
A. refers to the complete amino acid sequence of a protein. B. is another way of referring to the paracrystaline array of proteins that cover the surface of some prokaryotes. C. is a proteinaceous organelle of cyanobacteria that can be used as a source of carbon and fixed nitrogen. D. is the entire collection of proteins that an organism can produce.