Which of the following types of plankton can photosynthesize and produce its own food?
What will be an ideal response?
Phytoplankton
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From which body region would you expect to isolate Clostridium, Bacteroides, Fusobacterium and other anaerobic genera?
A. Stomach B. Skin C. Large intestine D. Nasopharynx
In the Grand Canyon, in the southwestern United States, there are many species of squirrels, including the Albert squirrel and a "subspecies," the Kaibab squirrel (isolation is not complete, according to the biological species definition by Ernst Mayr). The two populations of squirrels can interbreed to produce fertile offspring, but the populations exist on different portions of the rim of the Grand Canyon, separated by the canyon and the Colorado River. This is an example of speciation.
A. parapatric B. allopatric C. sympatric D. postzygotic E. prezygotic
The hierarchical system of nomenclature
a. allows diversity to be catalogued. b. organizes knowledge about species relationships. c. permits organisms to be identified. d. sorts organisms into groups. e. includes all of these
Which is a type of lymphocyte that forms in the bone marrow but matures in the thymus gland?
A) lymphoma B) T cell C) B cell D) none of the above