Which of the following is illustrated by the blood-type system in humans?
a. multiple alleles
b. codominance
c. sex-linked traits
d. crossover
a. multiple alleles
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One symptom of kidney failure can be the appearance of blood in the urine. This would indicate that which part of the kidney was damaged?
A. proximal convoluted tubule B. distal convoluted tubule C. glomerulus D. nephron E. collecting duct
The C4 mechanism of carbon fixation is an advantage for plants that live in:
a) ponds or other bodies of fresh water. b) swamps or bogs. c) the shade of other plants. d) hot, dry climates. e) tropical climates.
DNA analyses show that the ___ of many dissimilar organisms show important similarities at the molecular level.
Fill in the blank(s) with the appropriate word(s).
Do transposons (which represent more than half of mammalian genomes) serve a useful function?
What will be an ideal response?