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Which choice best fills in the blank in the statement below? The evolution of  _____ preceded (came before) the evolution of aerobic respiration (i.e. an aerobic heterotroph). (S 10)  

A very common device that uses the principle of expanding metal to operate a set of contacts is the ____________________ relay found in the refrigeration industry.

Photovoltaic devices are more often called ____________________.

Which choice best describes a difference between spontaneous generation and biogenesis. (H 4)  

A(n) ____________________ is a ferrous metal disk used to shunt a magnetic field away from some other object.

Figure 21-2 The accompanying figure indicates that there is a 200 amp, disconnect switch rated at 5,000 volts that can be used to disconnect the ____________________ from the power line.

One disadvantage of capacitive proximity detectors is that they have a very limited ____________________.

What is the major difference between prokaryotic and eukaryotic ribosomes? (CS 14)

Flow switches are used to detect the ____________________ of air or liquid through a duct or pipe.

Figure 22-1 In the above figure, the normally open contact of float FS1 is used to prevent the ____________________ from energizing unless the tank is full of water.