Which of the following is a lipid-derived hormone?
a. thyroxine
b. human growth hormone
c. estradiol
d. insulin
c. estradiol
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DNA strands can begin to separate at the temperature of ________.
A. 60°C B. 100°C C. 90°C D. 42°C E. 37°C
Which of the following occurs with alcohol
induced cirrhosis of the liver?
a. the production of albumin, important for solute balance, stops b. toxins accumulate in the brain c. blood flow is restricted d. a 50% chance of death within 10 years of onset e. all of these occur with alcohol induced cirrhosis of the liver
The typical prokaryotic flagellum features
a) a complex "motor" embedded in the cell wall and plasma membrane. b) an internal 9 + 2 pattern of microtubules. c) a basal body that is similar in structure to the cell's centrioles. d) an external covering provided by the plasma membrane.
Scientists disagree about how many species are currently on earth for all of the following reasons EXCEPT:
a) there is controversy over whether natural selection is the only mode of speciation. b) there is not one true definition of species. c) at any one time, there are few populations in the process of speciation. d) there are many organisms on Earth that have yet to be discovered. e) different scientists use different techniques to estimate the actual number of species from the known number of species.