A microorganism grows in the lab on medium containing mineral salts but no organic compounds. The organism is likely to be a(n)
A. heterotroph.
B. autotroph.
C. chemotroph.
D. chemoheterotroph.
E. The answer cannot be determined from the information provided.
Answer: B
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The Baltimore Scheme to classify viruses contains a total of ________ groups based on ________
A) four / genome composition B) four / genome composition and transcription mechanism C) seven / genome composition D) seven / genome composition and transcription mechanism
Humans are susceptible to scurvy because
A. they cannot synthesize amino acids. B. they do not have enough adipose tissue for vitamin A storage. C. they cannot synthesize vitamin C. D. they have a high incidence of fruit allergies. E. constant seasickness and nausea on long voyages leads to weakness and anemia.
Which of the following statements about body cells is TRUE?
a. All lymphocytes are leukocytes, but not all leukocytes are lymphocytes. b. All leukocytes are lymphocytes, but not all lymphocytes are leukocytes. c. Leukocyte and lymphocyte are different types of red blood cells. d. Leukocyte and lymphocyte are different names for the same cell. e. MHC proteins are not unique between vertebrate species.
If a pink snapdragon is self-fertilized, the offspring are red, pink, or white. What type of inheritance pattern does flower color exhibit in this example?
A. codominance B. incomplete dominance C. recessive D. incomplete recessive E. dominance