Which choice accurately conveys the complexity of neural connections in the human brain?
A) About 100 billion neurons each contact 1,000 to 10,000 other neurons.
B) A million or so neurons each contact up to 100 other neurons.
C) 10 million or so neurons each contact up to 10,000 other neurons.
D) A billion or so neurons each contact up to a million other neurons.
A) About 100 billion neurons each contact 1,000 to 10,000 other neurons.
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A capsule and phenoloxidase melanin synthesis are virulence factors contributing to the pathogenicity of which of the following organisms?
a. Aspergillus spp. b. P. brasiliensis c. B. dermatitidis d. C. neoformans
Which of the following is the sugar component of DNA nucleotides?
a. deoxyribose b. thymine c. guanine d. cytosine
Archaea are prokaryotes that are often found in inhospitable conditions such as hot springs and salt marshes
Indicate whether the statement is true or false
In what way is proteobacterial photosynthesis different from plant photosynthesis?
a. Proteobacterial photosynthesis does not use a proton gradient. b. Proteobacterial photosynthesis does not consume CO2. c. Proteobacterial photosynthesis uses water as an electron donor. d. Proteobacterial photosynthesis uses a different type of chlorophyll.