A flexible, spiral-shaped bacterium is called a
A. spirochete.
B. vibrio.
C. coccobacillus.
D. spirillum.
E. sarcina.
Answer: A
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A two-point testcross is a cross between
A) a double heterozygote for two linked genes and a double recessive genotype. B) a heterozygote for one of two linked genes and a double recessive genotype. C) a double heterozygote for two linked genes and a homozygous dominant genotype. D) a heterozygote for one gene and a homozygote for another. E) individuals with two different genetic markers.
A therapeutic approach that tries to get a person's own immune system more involved in the fight against malignant cells is called ________.
a) active immunotherapy b) indirect immunotherapy c) passive immunotherapy d) adaptive immunotherapy
Cyanobacteria are prokaryotes that carry out oxygenic photosynthesis like green plants; this means that ________.
A. they have two distinct photosystems B. they produce oxygen as a by-product of photosynthesis C. they use water as their electron source D. All of the choices are correct.
Which type of cell would have the hardest time exporting waste?
A. long and wide B. large and round C. irregular and long D. smooth and cuboidal