Some marine species of cyanobacteria ________.
A. do not have flagella but are, nonetheless, motile by some unknown mechanism
B. do not have flagella but are motile by means of pseudopods
C. do not have flagella and are, therefore, nonmotile
D. have flagella and are, therefore, motile
Answer: A
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phase to the vapor phase. __________________ Indicate whether the statement is true or false.
On which continent would you have seen the very earliest members of Homo sapiens?
A) Europe B) Asia C) Africa D) Australia
Which feature of mollusks is a rasping tongue-like organ?
A. cheliped B. pedipalp C. gills D. mantle E. radula
A process in which organisms with certain inherited characteristics are more likely to survive and reproduce than individuals with other characteristics is called ________.
A. evolutionary adaptation B. descent with modification C. natural selection D. evolution