1. Two food chains are represented by this food web. Which organism is part of both food chains? O   a. hawk O   b. fox O   c. mushrooms O   d. none of these

2. Only about 10% of the energy available in one trophic level is carried to the next level. Approximately how much energy is available to the secondary consumers in this energy pyramid? O   a. 10 kcal/m2/year O   b. 100 kcal/m2/year O   c. 1,000 kcal/m2/year O   d. 5,000 kcal/m2/year

3. In one species of plant, the flower petals are normally purple if both enzyme A and enzyme B are produced. If a mutation occurred that stopped production of enzyme A, but not enzyme B, what color flower petals would be produced? O   a. red O   b. blue O   c. white O   d. purple

4. Biology students studied the effect of temperature on the production of carbon dioxide by yeast cells. A diagram of their experiment is shown.

They counted the number of carbon dioxide bubbles produced by the yeast at different temperatures. A graph of their results is shown.

According to the data above, which of these is the best conclusion that can be made from this experiment?

O   a. CO₂ production is not influenced by temperature
O   b. Yeast cells produce more CO₂ at lower temperatures
O   c. The higher the temperature, the greater the production of CO₂
O   d. CO₂ production first increases then decreases as temperature rises

The graph represents data from an experiment on cellular respiration.
Use the graph to answer questions 5 - 7.

5. The independent variable on this graph is

O   a. Concentration of Sugar
O   b. Amount ATP Produced
O   c. Effect of Sugar on ATP
O   d. none of these

6. Which of the following conclusions is best supported by data from this graph?

O   a. ATP production is independent of sugar availability
O   b. The amount of cellular respiration is constant in muscle cells
O   c. ATP is only produced when sugar concentration is above 4 g/L
O   d. Cellular respiration increases as sugar concentration increases.

7. The line drawn on this graph is a "best fit" line. You know this because

O   a. of the slant of the line
O   b. a straight line is drawn even though it does not touch all the data point
O   c. the line does not start at the zero point on the graph
O   d. the line does not curve

8. Genetic information flows in one specific direction. Which of the following best represents this flow?

O   a. DNA --> Protein --> RNA
O   b. Protein --> RNA --> DNA
O   c. RNA --> Protein --> DNA
O   d. DNA --> RNA --> Protein