Why does the Calvin cycle not operate at night?

Three people are asked their opinion in a poll about a particular brand of a common product found in grocery stores. They can answer in one of three ways: "Like the product brand" ($L$), "Dislike the product brand" ($D$), or "Undecided" ($U$). For each outcome, the random variable $X$ assigns the number of $L$'s that appear. Find the set of possible outcomes and the range of $X$.

In isosceles triangle $A B C , \angle B$ is a right angle. What are the measures of angles A, B, and C? Justify your answer.

Expand the term, $2^4 \div 2^1$ in the quotient of powers. Write the quotient in expanded form. Then write the quotient using an exponent.

A circuit consists of a resistor, an ideal 1.4-H inductor, and an ideal $60-\mathrm{Hz}$ generator, all connected in series. The rms voltage across the resistor is $30 \mathrm{~V}$ and the rms voltage across the inductor is $40 \mathrm{~V}$. Determine the resistance of the resistor.

Check your understanding of the fotonovela by answering these questions. Remember that intelligent guessing is a useful way to increase your understanding in a foreign language.

Which of the students seems to be mischievous? How?

Factor completely. If a polynomial cannot be factored, write prime. First write the trinomial in descending powers and then factor.

$$r^2-r-30$$

Differentiate speed, duration, and latency measures of behavior. Describe how each could be used in evaluating the behavior of studying.

A Statistics professor comes home to find that all four of his children got white team shirts from soccer camp this year. He concludes that this year, unlike other years, the camp must not be using a variety of colors. But then he finds out that in each child's age group, there are 4 teams, only 1 of which wears white shirts. Each child just happened to get on the white team at random.

We lied. Actually, in the oldest child's group, there are 6 teams instead of the 4 teams in each of the other three groups. How does this change the probability you calculated in part b?

For each key term or person in the lesson, write a sentence explaining its significance.

Check your understanding of the fotonovela by answering these questions. Remember that intelligent guessing is a useful way to increase your understanding in a foreign language.

What time is it when this story begins?

The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Why?

A. It is often too cold at night for these reactions to take place.

B. Carbon dioxide concentrations decrease at night.

C. Plants usually open their stomata at night.

D. At night, no water is available for the Calvin cycle.

E. The Calvin cycle requires products only produced when the photosystems are illuminated.

The quarterback of a football team releases a pass at a height of 7 feet above the playing field, and the football is caught at a height of 5 feet, 20 yards directly downfield. The pass is released at an angle of $30^{\circ}$ with the horizontal. Find the speed of the football when it is released.

Expand the term,$8^5 \div 8^3$ in the quotient of powers. Write the quotient in expanded form. Then write the quotient using an exponent.