Which of the following animals is a genetic male?
A. honeybee diploid
B. grasshopper XO
C. Drosophila XXY
D. bird ZW
Answer: B
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The causative organism of whooping cough is ________.
A. Cornyebacterium diphtheriae B. Haemophilus influenzae C. Bordetella pertussis D. Streptococcus pyogenes E. Streptococcus pneumoniae
Which of the following is suggested by the fact that all eukaryotes have either functional mitochondria or mitochondria-like organelles?
a. Mitochondria evolved before plastids. b. Plastids evolved before mitochondria. c. Mitochondria and plastids are both chloroplasts. d. Chloroplasts are related to mitochondria but not plastids.
Filter feeders on coastal shelves tend to dominate in areas that have:
a. moving currents and coarse sediments. b. no currents and fine sediments. c. silty areas. d. muddy areas.
Which of the following is false about the diatoms?
a. They have been around for millions of years. b. They are important marine primary producers. c. They have overlapping pillbox-like shells. d. Their shells are made of calcium carbonate. e. They are important in the global cycling of carbon.