The Gram stain works because of differences in the ________ of bacteria
A) genetic characteristics
B) cell walls
C) cell membranes
D) antigens
E) capsules
B
Bloom's Taxonomy: Knowledge
Section: Staining
Learning Outcome: 4.15
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Being heterozygous for the hemoglobin gene variant that causes the disease sickle-cell anemia can be advantageous in what situation?
A. in areas where malaria is endemic B. when iron intake is too low in the diet C. in elite athletes because it slightly decreases oxygen affinity D. when a person has anemia caused by other factors E. when a person is at high altitude
Which one of the following organelles is involved in the production of proteins that are exported from the cell?
A) rough endoplasmic reticulum B) lysosome C) mitochondrion D) smooth endoplasmic reticulum E) centriole
Genetic drift has the strongest effects in populations that are:
a) in Hardy-Weinberg equilibrium. b) small. c) characterized by extensive gene flow. d) undergoing natural selection. e) large.
Which of the following shows a brain structure correctly paired with one of its primary functions?
A) frontal lobe — decision making B) occipital lobe — control of skeletal muscles C) temporal lobe — visual processing D) occipital lobe — speech production