Which of the following statements is incorrect regarding the effects of rubella and rubeola in different populations?
A. Infection during pregnancy with either of these viruses can cause serious injury to the fetus.
B. Congenital rubella is least serious if it is contracted during the final trimester of pregnancy.
C. A six-year-old child infected with rubeola will experience fever, cough, and a rash, and barring complications, should recover in a few weeks.
D. A 30-year-old man infected with rubella will experience severe symptoms and require constant medical attention for several weeks.
Answer: D
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Synthetic anabolic steroids:
A. All of the answer options are correct. B. promote protein synthesis. C. promote anabolic metabolism to store energy within cells. D. build and strengthen muscle tissue. E. interfere with the normal production of anterior pituitary tropic hormones.
The bacterium Bacillus tumefaciens has been harnessed in biotechnology because it can insert a gene from one species of plant into another. This can also occur in nature and is referred to as
A. vestigial transfer. B. homology. C. horizontal gene transfer. D. vertical evolution. E. exon shuffling through endocytosis.
The most common sexually transmitted disease in the United States is caused by:
A) Candida albicans. B) Chlamydia trachomatis. C) Neisseria gonorrhoeae. D) Trichomonas vaginalis.
File this one under "confusing plant terminology." Both a plant's stoma and its stroma are important in photosynthesis. What's the difference between stoma and stroma?
a) Stoma is the singular of stomata, the gas exchange pores in the leaf of the plant, while stroma is the fluid that fills the inner space of a chloroplast. b) Stoma is the singular of stomata, the fluid that fills the inner space of a chloroplast, while stroma are the gas exchange pores in the leaf of the plant. c) Stoma is the singular of stomata, the gas exchange pores in the leaf of the plant, while stroma is the disk-like membranous sac in which the light-reactions of photosynthesis take place. d) Stoma refers to the non-sexual cells of a plant, while stroma is the fluid that fills the inner space of a chloroplast. e) Stoma is the fluid that fills the inner space of a chloroplast, while stroma is a stack of disk-like thylakoids.