Charlotte liked to have a suntan all of the time, so she never wore sunscreen at the beach or in the tanning salon. During a visit to her doctor, she was told that she has the most common form of skin cancer. She will be all right, but she should avoid
prolonged exposure to UV radiation in the future. Which skin cancer does she have?
A) melanoma B) basal cell carcinoma
C) squamous cell carcinoma D) sebaceous carcinoma
Answer: B
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Some mutations have no effect on the organism and are therefore considered neutral
A. true B. false
Given the sex determination system in bees, we can expect that
A) female bees will produce eggs by meiosis, whereas male bees will produce sperm by mitosis. B) female bees will produce eggs by mitosis, whereas male bees will produce sperm by meiosis. C) male and female bees will produce sperm and eggs by meiosis. D) male and female bees will produce sperm and eggs by mitosis.
Nitrogen fixation consists of the
A) conversion of ammonia to nitrate. B) production of ammonium from decomposing organic matter. C) conversion of N2 to ammonia. D) conversion of N2 to ammonia or nitrate.
What is the basis of the typical -70 mV resting potential in neurons? Rank the factors in order from most important to least important.____ K+ equilibrium potential____ Ca+2 equilibrium potential____ Na+ equilibrium potential
What will be an ideal response?