A patient presents with bleeding gums, loss of teeth, and slow wound healing. The doctor diagnoses the patient as having a deficiency in vitamin ___ and suggests that he increase the amount of ___ in his diet
A. C; fruit
B. C; eggs
C. D; dairy products
D. E; fruit
E. E; vegetables
A
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The process of imprinting of a gene:
A. ensures that both alleles of a particular gene contribute to the phenotype. B. is a mechanism to completely shut down the expression of an allele derived from one parent in a diploid cell. C. relies on the DNA sequence alone. D. All of the choices are correct.
Four of the following are useful for dating fossils greater than 10 million years. Select the exception
a. Carbon-14 d. Thorium-232 b. Uranium-238 e. Rubidium-87 c. Uranium-235
Within the typical sexual reproduction of green algae, the genetic composition of the sporophyte form of the protist is
A. limited to the DNA found within the chloroplasts, because the sporophyte is a dormant form of the protist. B. 1n, or haploid, because the sporophyte follows meiosis. C. 2n, or diploid, because the sporophyte follows fertilization, growing and differentiating through numerous cell cycles. D. None of the answer choices is correct. E. reproduced through mitosis, after the zygote single cell has formed.
Spoilage of canned foods due to inadequate processing, NOT accompanied by gas production, is
A) thermophilic anaerobic spoilage. B) flat sour spoilage. C) spoilage by mesophilic bacteria. D) caused by acid-tolerant fungi. E) putrefactive anaerobic spoilage.