Which one of the following is never found in prokaryotic cells?
A) flagella
B) capsule
C) cilia
D) ribosomes
C) cilia
Biology & Microbiology
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Which era saw the rise of seeds and pollen in plants?
A) Precambrian B) Cenozoic C) Paleozoic D) Cretaceous E) Mesozoic
Biology & Microbiology
Which of the following sulfur species is highly toxic?
a. hydrogen sulfide b. dimethylsulfide c. elemental sulfur d. calcium sulfate
Biology & Microbiology
What do we call populations of organisms that are usually near the carrying capacity?
A. K-selected B. Parasites C. Perennials D. r-selected E. Predators
Biology & Microbiology
Recombinant DNA technologies involve techniques that permit the creation of custom-made DNA molecules that can be introduced back into living organisms. These technologies were first developed in the ______
(a) 1930s. (b) 1950s. (c) 1970s. (d) 1990s.
Biology & Microbiology