Bergey’s Manual of Determinative Bacteriology bases classification on:
A. Geographic origin
B. rRNA
C. Phenotype
D. Genotype
Ans: C. Phenotype
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Which of the following statements correctly describe(s) a relationship between transpiration and other processes in plants? Select all that apply.
a. Transpiration is important in cooling leaves on warm, sunny days. b. In most plants, the highest rate of transpiration occurs when the rate of photosynthesis is also highest. c. Open stomata provide a low-resistance pathway for CO2 to enter and for water to exit the leaf. d. The large surface area exposed to air inside the leaf maximizes the plant’s ability to absorb CO2 while minimizing water loss through transpiration. e. Water is pulled from the roots to the leaves by transpiration, whereas mineral nutrients diffuse from the roots to the leaves. f. To minimize water loss during dry conditions, most plants must also restrict their ability to carry out photosynthesis.
The most serious teratogenic effects of intrauterine rubella infection occur if it is acquired during the third trimester.
Answer the following statement true (T) or false (F)
Typically, one one sperm fertilizes the oocyte
because
a. an acid solution is released that kills all other sperm. b. special organelles within the oocyte eject more than one sperm. c. changes occur to the protein coat that prevent further penetration. d. follicle cellular space is only wide enough for one sperm. e. usually only one sperm arrives at the oocyte.
Which of the following best describes the relationship at the molecular level between mutant alleles and phenotype?
A) A mutant allele will cause only one phenotype. B) The wild-type allele is always dominant. C) A mutant allele can have different effects depending on the gene product's function. D) Mutant alleles will only cause problems when seen in the homozygous form, no matter the gene affected. E) A mutant allele will cause the wild-type protein not to be made.