If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be ________.
A. totifocal
B. parfocal
C. optifocal
D. equifocal
Answer: B
Biology & Microbiology
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If you observe a cell that contains organelles, then that cell is most likely a(n) prokaryote
__________________ Indicate whether the statement is true or false.
Biology & Microbiology
The courtship rituals of many related animals are highly species-specific and prevent the related species from mating. This is an example of
A. habitat preference. B. ecological isolation. C. seasonal isolation. D. behavioral isolation.
Biology & Microbiology
Conducting tubes of phloem consist of stacks of ____.?
A. dead sieve elements
B. living sieve elements
C. dead vessel elements
D. living vessel elements
E. dead companion cells
Biology & Microbiology
Flagella all over the cell is known as...
a. amphitrichous b. lophotrichous c. boutatrichous d. peritrichous
Biology & Microbiology