Solve the Problem. -Sparky Has Scores of 71, 60, and 69 on His

question 234

Multiple Choice

Solve the problem.
-Sparky has scores of 71, 60, and 69 on his first three Sociology tests. If he needs to keep an average of 70 to stay eligible for lacrosse, what scores on the fourth exam will accomplish this?

• A) He must score more than 84
• B) He must score 84 or higher.
• C) He must score 80 or higher.
• D) He must score more than 80

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Definitions:

Chromatids

Each of the two thread-like strands into which a chromosome divides longitudinally during cell division. Each contains a double helix of DNA.

Rotating Flagella

Hair-like structures that protrude from the cell body of certain bacterial cells, rotating like propellers to enable movement.

Cilia

Microscopic, hair-like structures that extend from the surface of many animal cells, involved in movement and sensory functions.

Pili

Hairlike structures on the surface of many bacteria; function in conjugation or attachment. A sex pilus forms a cytoplasmic bridge with another bacterium and transfers DNA via this bridge.