Which of the following makes its own food using energy and simple raw materials it obtains from nonbiological sources?
A. Producer
B. Nutrient
C. Consumer
D. Cell
E. Protist
Answer: A
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Chordates include:
A. tunicates and echinoderms. B. cephalochordates and arthropods. C. tunicates and vertebrates. D. mollusks and cnidarians.
A selective growth medium
A. allows only certain bacteria to grow. B. allows all bacteria to grow. C. allows no bacteria to grow. D. accentuates differences between the growing bacteria.
If a characteristic is sex-linked , it
a. occurs most commonly in males b. occurs only in females c. is always fatal d. can never occur in females
Which types of phenotypic ratios are likely to occur in crosses when dealing with a single gene pair for which all the genotypic combinations are of equal viability?
A) 12:3:1, 9:7 B) 1:4:6:4:1, 1:1:1:1 C) 9:3:3:1, 27:9:9:9:3:3:3:1 D) 2:3, 1:2 E) 1:2:1, 3:1