Using an example, describe the aquatic food chain
What will be an ideal response?
ANS:The
aquatic environment constantly changes to maintain a balance of organisms that function in the
food chain or system. A simple illustration is the makeup of a freshwater pond. The food chain is
fueled by sunlight. Green plants and algae use this energy to grow and use nutrients they absorb from
the water. These plants are eaten by fish and other animals, which then become prey of larger animals
(fish, reptiles, and others) and sometimes humans. These large animals return nutrients to the water as
waste, or carrion, that is reabsorbed by plants for growth. The maintenance of this food chain supports
life.
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When using the rule-of-thumb estimation method, materials _____ .
A. can be grossly overestimated B. should not be grossly overestimated or underestimated C. can be underestimated but never overestimated D. should not be overestimated
Which layers of the OSI model deal with application- and software-related communication issues?
A. Layers 4,5 & 6 B. Layers 1,2 & 3 C. Layer 5 & 6 D. Layer 1 & 2
For pipe sizes up to 12 inches, nominal size is an approximation of the _____ of a Schedule 40 pipe.
a. outside diameter b. inside diameter c. circumference d. radius
List the most common metric units in automotive service.
What will be an ideal response?