A scientist discovers a new species near coral reefs in Australia. On basic microscopic examination and after conducting a few simple experiments, he finds that this single-celled species is photosynthetic (using sunlight for energy),
has a rigid cell wall structure with no peptidoglycan, uses a flagellum for motion, and contains a variety of internal structures that are bound by plasma membranes. Given this information, this new species is most likely a ______ cell in the _____ subcategory.
A. bacterial; eubacterial
B. eukaryotic; fungus
C. archaebacterial; fungus
D. eukaryotic; algae
E. eukaryotic; protozoan
D
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Different species of fruit flies occupy each of the islands in the Hawaiian island chain, a group of volcanic islands that formed one after the other
One hypothesis for how the different fruit fly species formed is that, after each new island was formed, fruit flies from existing islands colonized it and subsequently diverged. If this hypothesis is correct, it would be an example of: A. allopatric speciation by dispersal. B. allopatric speciation by vicariance. C. peripatric speciation by vicariance. D. sympatric speciation by dispersal. E. sympatric speciation by vicariance.
The anther represents the _____ portion of the plant, while the ovules represent the ____ portion of the plant
A. Female ; male B. Male ; female C. Female ; female D. Male ; male
The best contraceptive device to prevent the spread of sexually transmitted diseases is the
A. condom. B. diaphragm. C. IUD. D. contraceptive pill.
What was the reason Darwin was sailing aboard the HMS Beagle?
a. He was a naturalist. b. He was a geologist. c. He was the captain's personal physician. d. He was the captain's dining companion.