Rods are
A. concentrated in the fovea.
B. sensitive mainly to blue, green, or red light in humans.
C. the only photoreceptors which contain opsins.
D. the only photoreceptors which contain rhodopsin.
E. concentrated in the fovea and sensitive to colors.
D. the only photoreceptors which contain rhodopsin.
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Microbial growth is generally described as the increased number of cells rather than the expanding size of an individual microbial cell
Indicate whether the statement is true or false.
The first law of thermodynamics says energy cannot be created or _______.
a. transferred b. transformed c. destroyed d. delayed
Four of the five answers listed below are related by a common source. Select the exception
a. glucocorticoids b. sex hormones c. cortisol d. adrenalin (epinephrine) e. mineralocorticoid
Which of the following is an INCORRECT statement about restriction enzymes?
A) Most restriction enzymes are isolated from bacteria. B) Restriction enzymes usually recognize palindromic sequences. C) Restriction enzymes create phosphodiester bonds between pieces of DNA in a cloning experiment. D) Restriction enzymes can cut to create overlapping single-stranded ends of DNA. E) Restriction enzymes can cut to create blunt-ended pieces of DNA.