The genus Mycobacterium includes species responsible for
A. tuberculosis.
B. urinary tract infections.
C. food poisoning from contaminated dairy products.
D. gastric ulcers.
E. food poisoning from contaminated meat.
Answer: A
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In plants, the gametes produced by a particular gametophyte are ____
a. always identical because they result from meiosis b. always identical because they result from mitosis c. sometimes identical because they result from meiosis d. sometimes identical because they result from mitosis e. never identical because they result from meiosis
Which type of bond holds the nucleotide bases together in a DNA molecule?
a. hydrogen b. covalent c. ionic d. network e. peptide
The sex of birds, some insects, and other organisms is determined by a ZW chromosomal arrangement in which the males have like sex chromosomes (ZZ) and females are ZW (similar to XY in humans)
Assume that a recessive lethal allele on the Z chromosome causes death of an embryo in birds. What sex ratio would result in the offspring if a cross were made between a male heterozygous for the lethal allele and a normal female? A) 4:1 male to female B) 1:2 male to female C) 1:1 male to female D) 2:1 male to female E) 3:1 male to female
What energy molecule is produced during the light reactions and helps to power the Calvin cycle?
A) ATP B) glucose C) sucrose D) NADP+