Transformation is defined as the:
a. change of the bacterial genotypes through the exchange of DNA from one cell to another.
b. internal change in the original nucleotide sequence of a gene or genes within an or-ganism's genome.
c. process by which genetic elements such as plasmids and transposons excise from one genomic location and insert into another.
d. uptake of free DNA from the environment and recombination with the recipient's homologous DNA.
D
Transformation involves recipient uptake of DNA that is free in the environment when another bacterial cell dies and undergoes lysis.
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Shannon diversity (Hs)
A. goes up with increases in the number of species sampled and is higher when individuals are more equitably distributed among species. B. is higher when individuals are more equitably distributed among species. C. is independent of abundance. D. increases in areas undergoing secondary succession. E. is higher when individuals are more equitably distributed among species and is independent of abundance.
The ____ layer of the mammalian gut performs peristalsis
a. mucosa b. muscularis c. serosa d. submucosa e. submucosa and muscularis
Which statement is true about sudden cardiac arrest?
a. It happens about 20,000 times annually in the United States. b. It is usually caused by a birth defect when it happens in people aged 36 or younger. c. Its survival rate can be increased by performing a tracheotomy d. It occurs only in the elderly. e. Its survival rate increases about 10% through the use of CPR.
The blastula forms before this stage
a. A b. B c. C d. D e. E