Choose the letter of the best match from the following:A. nitrogenB. calciumC. potassiumD. phosphorusE. magnesiumComponent of cell walls, involved in maintenance of membrane structure.
Fill in the blank(s) with the appropriate word(s).
B
Calcium is an important component of cell walls and the maintenance of membrane structure and permeability.
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Embryogenesis in plants is about the same process as _____
A) cleavage in animals B) gastrulation in animals C) organogenesis in animals D) cleavage, gastrulation, and organogenesis in animals
To make sure they treat the infection with the correct drug, doctors order DNA fingerprinting of a sample of bacteria taken from the patient for comparison to known fingerprints of strains A, B, and C. With which antibiotic should the patient be treated?
A patient is admitted to the hospital with a mysterious infection. After running some standard tests, doctors believe that the infection is caused by one of three closely—related bacterial strains — A, B, or C — that are hard to treat because they have become resistant to some antibiotics.
Strain A is resistant to antibiotic beta and antibiotic omega
Strain B is resistant to antibiotic alpha and antibiotic omega
Strain C is resistant to antibiotic alpha and antibiotic beta
A. antibiotic alpha.
B. antibiotic beta.
C. antibiotic omega.
D. antibiotic beta or antibiotic omega.
E. any antibiotic will work to kill the bacteria causing the infection.
Which of the following is a distinguishing feature of monotremes?
a. laying leathery eggs b. keeping their young in a pouch c. having stereoscopic vision d. having two sets of teeth
Insertion mutations are often caused by
a. base-pair substitutions. b. frameshift mutations. c. transposable elements. d. gene duplications. e. deletions