Which of the following characterizes the Domain Bacteria?
A) prokaryotic cells; ether linkages in phospholipids
B) eukaryotic cells; ester linkages in phospholipids
C) prokaryotic cells; ester linkages in phospholipids
D) complex cellular structures
E) multicellular
C
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What has occurred to bring about this specialtion?
A storm blows a small group of migrating birds off course and they land on an island too far from the mainland for them to fly back on course. The birds remain on the island for 100 generations when a second storm blows more birds from the mainland to the island. The new birds cannot mate with the established birds, even though they are originally from the same population. A. Genetic drift. B. Doubling of chromosome number in the mainland birds. C. Geographical isolation resulting in reproductive isolation. D. Development of a reproductive isolating mechanism dealing with sperm count. E. All of these.
Which of the following forms of communication do not rely on vision?
a. tactile b. pheromones c. mutualism d. both tactile and pheromones
Several cases of an emerging infectious disease are reported in workers at a research station that borders a tropical rainforest region. The pathogen is identified as a species of bacteria carried by nematodes that infect mosquitos, and disease transmission occurs in a human host following a mosquito bite. Which organisms should be targeted in the treatment of infected patients?
A. Mosquito and nematode B. Mosquito and bacteria C. Nematode and bacteria D. Mosquito, nematode, and bacteria
Secondary infections that result from the killing of some of the normal microbiota are called (antagonism/superinfections/resistance)
What will be an ideal response?