This animal has hemolymph that empties into
an internal cavity. Which animal is it?
a. a bee
b. a clam
c. a monkey
d. an earthworm
e. more than one of these animals
E
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Bacteriophage have a ________ complex structure than animal viruses, because ________
A) more / bacteriophages must be coated by lipopolysaccharide to attach to bacterial cells B) less / the bacteriophage does not have to penetrate the nucleus C) more / the bacteriophage must penetrate the peptidoglycan cell wall D) less / there prokaryotic cells have a simple structure compared to eukaryotic cells
Why is it important for cells to be able to communicate with one another? List the main steps involved
in cell signaling. What will be an ideal response?
Gram-positive bacteria would stain __________ in a gram stain because of a thick layer of
__________ in their cell walls. a. green; peptidoglycan b. purple; peptidoglycan c. green; cellulose d. purple; polysaccharides e. red; polysaccharides
State whether the following statement is true or false; then give your reasoning: The terminating "hairpin" loop occurs in the trp operon when sufficient tryptophan is present
Indicate whether the statement is true or false