The prokaryotic chromosome is
A. held within a membrane-bound nucleus.
B. localized to a nucleoid region.
C. circular and loosely packed.
D. composed of single-stranded DNA.
E. linear and tightly wrapped around histone proteins.
B. localized to a nucleoid region.
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What are the nodes of Ranvier?
A. breaks in the myelination along an axon B. the population of voltage-gated sodium channels located at the axon hillock C. the point of communication between an axon terminal and a muscle cell D. branch points along an axon
The early amniotes
a. developed a land egg. b. had a four-chambered heart. c. had lungs equipped with air sacs. d. were bipedal and gave rise to the mammals. e. appeared at the start of the Paleozoic Era.
The symptoms of HPV can be treated, but there is no cure
Indicate whether the statement is true or false
Which of the following would you expect to dissolve poorly in water?
A. Anions B. Cations C. A substance with a lot of polar covalent bonds D. A substance with a lot of non-polar covalent bonds