Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What does this indicate about the relative importance of chlorophyll a and b in photosynthesis?
A. Reflection of light by chlorophyll a and b is essential for the process of photosynthesis.
B. Absorption of light by chlorophyll a and b is essential for the process of photosynthesis.
C. Chlorophyll a and b are much less important than other pigments in the reflection, absorption and transmission of light relevant to photosynthesis.
D. Transmission of light by chlorophyll a and b is essential for the process of photosynthesis.
Answer: B
You might also like to view...
Individual skeletal muscle cells are packed with cylindrical contractile elements about 1 mm in
diameter called
a. muscle fibers. b. sarcomeres. c. tendons. d. ligaments. e. myofibrils.
Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. What does this experiment show?
A. Cells continue to grow as long as there is adequate space. B. The controls on cell growth and division can be turned on and off. C. When cells come into contact with other cells, they stop growing. D. Cell division can be regulated by factors outside of the cell. E. All of the answer choices are correct.
Benthic algae are found
A. near the ocean shore. B. floating on the ocean surface. C. only in fresh water. D. in the deep parts of the ocean.
A circular molecule of DNA devoid of any histone proteins describes the chromosome of a (an)
A. protozoa. B. flowering plants. C. insects. D. bacteria. E. yeasts.