In an experiment, Jokela et al. reared 14 replicate populations of a snail that is poly-morphic for sexual/asexual reproduction under controlled identical conditions in the lab
Each population started with 35% asexual and 65% sexual experiments. The figure be-low shows the proportions of asexual after a year-long experimental run. What are possible explanations for this result?
a. All asexuals survived better under the experimental conditions.
b. Asexual females produced more offspring per individual than sexual fe-males.
c. The cost of males leads to faster population growth for the asexual sub-population.
d. A novel mutation after the start of the experiment led to the increased sur-vival of the asexual line with the mutations.
e. A, B, and C.
E
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a. electroconvulsive therapy b. smoking cigarettes c. playing a musical instrument d. taking vitamin supplements
What happens immediately following the closing of the sodium gates during an action potential?
a. Sodium ions enter the cell. b. Sodium ions leave the cell. c. Potassium ions enter the cell. d. Potassium ions leave the cell. e. Calcium ions leave the cell.
After a restriction enzyme cuts DNA into fragments and the fragments pair with complementary bases, the enzyme
____________________ is used to seal the gaps in the phosphate backbone. Fill in the blank(s) with the appropriate word(s).
The study of the practical uses of microbes in various industries and technologies is ________.
A. applied microbiology B. microbial ecology C. bioengineering D. biotechnology E. industrial microbiology