Describe a food chain
What will be an ideal response?
A food chain is a linked group of plants and animals that feed on or provide nourishment to each other. A plant
grows in the soil. A small animal eats the plant. A predator eats the small animal. The predator dies and decays.
The nutrients from its body return to the soil to be used by another plant.
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Which of the following treatment methods is used to control acidity?
a. softeners b. neutralizing tanks c. activated charcoal filters d. manganese oxidizing filters
What are the two main ways in which avian influenza type A viruses may be transmitted from animals to humans?
What will be an ideal response?
An evaporator that covers the coils being cooled with liquid refrigerant is a:
A) Flooded evaporator. B) Direct expansion evaporator. C) Saturated evaporator. D) Carbureting evaporator.
What is the difference between the 74192 and the 74193 counter?
A) The 74192 is the only one that can parallel load. B) The 74192 is asynchronous; the 74193 is synchronous. C) The 74192 counts down; the 74193 counts up. D) The 74192 is a BCD counter; the 74193 is a binary counter.