Below is a high-magnification photomicrograph of an organism similar to one you observed in this exercise. Each rectangular “box” is a single cell. What normally visible organelle is absent from each cell that makes it “prokaryotic?”

What will be an ideal response?


These cells contain no true nucleus.

Biology & Microbiology

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Functions of the mantle in clams include

(a) secreting the shell. (b) forming pearls around irritating grains of sand. (c) forming the incurrent and excurrent siphons. (d) all of the above.

Biology & Microbiology

Give examples of plants in each of the gymnosperm phyla. Differentiate among them with respect to morphology and

reproductive characteristics. Which is the most diverse? Least diverse? What will be an ideal response?

Biology & Microbiology

The Social Readjustment Rating Scale, constructed by Holmes and Rahe, measures the stress in a person's life on the basis of _____.

A. life changes B. stress tolerance C. daily hassles D. the balance between eustress and distress

Biology & Microbiology

The use of sulfate as a terminal electron acceptor by Desulfovibrio is an example of assimilatory sulfate reduction.

Answer the following statement true (T) or false (F)

Biology & Microbiology