The splitting of water produces three products. Name and discuss the role of each. What will be an ideal response?
First, an electron is liberated. This electron is excited by photosystem II and passed through the
noncyclic pathway of photosynthesis. Second, hydrogen ions are generated, and these contribute to
the high density of hydrogen ions in the thylakoid compartment. Last, oxygen is produced. This is a
waste product to the photosynthetic organism but is responsible for the oxygen-rich environment
today.
Where it Starts – Photosynthesis 53
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Which of the following systems is the first of those listed below to begin development in the human
embryo? a. nervous system b. excretory system c. reproductive system d. skeletal system e. endocrine system
What drives the process of transpiration?
a. upward pressure as sugar is forced into the roots b. evaporation c. pumping by the xylem cells d. passive transport
In dry shrublands, ____.
A. plants are adapted to episodes of fire B. primary production is abundant throughout the year C. there are constant cool temperatures throughout the year D. winters are mild and summers are wet E. precipitation occurs evenly year round
How do group A streptococci camouflage themselves from white blood cells?
A. they produce coagulase, allowing the bacteria to hide within blood clots. B. they grow in chains or pairs. C. they produce streptokinase, which breaks down blood clots. D. they have hyaluronic acid capsules. E. they have a coating of protein M.