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The following questions refer to the description and Table 28.1 below.
Diatoms are encased in Petri-plate-like cases (valves) made of translucent hydrated silica whose thickness can be varied. The material used to store excess calories can also be varied. At certain times, diatoms store excess calories in the form of the liquid polysaccharide, laminarin, and at other times, as oil. Below are data concerning the density (specific gravity) of various components of diatoms, and of their environment.
Table 28.1: Specific Gravities of Materials Relevant to Diatoms
-Which pair of alternatives is highlighted by the life cycle of the cellular slime molds, such as Dictyostelium?
Q21: The endoskeletons of most vertebrates are composed
Q21: Two species of frogs belonging to the
Q30: Whatever its ultimate cause(s), the Cambrian explosion
Q35: A lophophore is used by ectoprocts and
Q47: The fruit has light, fibrous plumes.<br>A)animal skin,
Q54: If a multicellular animal lacks True tissues,
Q58: A rapid method of speciation that has
Q64: An early consequence of the release of
Q68: The main way that pine trees disperse
Q84: What probably explains the inclusion of rabbits