In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over
spotted (s). If a red male was crossed with a black female to produce a red, spotted puppy, the
genotypes of the parents (with male genotype first) would be
a. Bb Ss ? Bb Ss.
b. bb Ss ? Bb Ss.
c. bb ss ? Bb Ss.
d. bb Ss ? Bb ss.
e. Bb ss ? Bb ss.
B
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________ is to xylem as ________ is to phloem
A) Sclerenchyma cell; collenchyma cell B) Apical meristem; vascular cambium C) Vessel element; sieve-tube member D) Cortex; pith E) Vascular cambium; cork cambium
What tissue lines the digestive tract?
a. connective b. muscular c. cartilage d. epithelium e. neural
The most likely mode of transmission of pneumonic plague between humans is
a. Direct contact. b. Droplet transmission. c. Fomite. d. Vector. e. Vehicle transmission.
Which property is true of living things?
A. They are stable over time. B. They are stable over many generations. C. They use protein as their hereditary material. D. They must obtain all organic molecules of life from external sources. E. They require water.