What are the characteristics of snakes?
What will be an ideal response?
Snakes have long bodies that taper into tails. They do not have limbs, and their movement is a result of
undulating movements of the body. The scales on the underside of the body project outward as the muscles
are contracted and relaxed. These scales exert pressure on the surface and move the animal forward.
The skin of snakes has a horny surface layer that forms a hard, continuous covering of scales. These scales
lie beneath the outer layer of the epidermis so that the body can grow. As the animal grows, this outer layer is
shed, allowing for further growth.
Snakes cannot close their eyes. Instead of eyelids, they have a transparent layer, or brille, that permanently
covers the eye. During the shedding process, this layer over the eye is shed and replaced with a new covering.
Nocturnal species have vertical pupils that open very wide in dim light and close to small slits or pinholes in
bright light. Diurnal species have round pupils.
Snakes have teeth that are fused to the jawbones. Some snakes also have teeth fused to the palate bones,
and some have teeth connected to poison glands. All snakes have long, slender, forked tongues.
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Las partes de la escalera marcadas con la letra C en la Figura 2 representan _____.
a. altura de escalón
(contrahuellas)
b. peldaños
c. zancas
d. marcos
The _____ was exploited for its valuable hides
a. bald eagle b. buffalo c. American alligator d. wild turkey
Which of the following statements most accurately describes the bonding requirements for hazardous (classified) locations?
A. Bonding is required from the hazardous location to the control panel. B. Bonding is required from the hazardous location to the panelboard where the branch circuit originates. C. Bonding is required from the hazardous location to the source of the separately derived system. D. If locknuts and bushings are tightened securely, extra bonding is not required in hazardous locations.
Which of the following is the correct way to dimension a hidden line?
A. provide an overall dimension B. underline hidden lines with a solid straight line C. convert it to a sectional view, so you can dimension to a solid line D. call out the dimension with the term, "MAX"