In respiration, which one of the following is not done directly by the electron transport chain (or its components)?
a. carry electrons
b. carry protons
c. pump hydrogen ions across the inner mitochondrial membrane
d. regenerate (oxidized) NAD+
e. add a P to ADP, making ATP
Answer: e. add a P to ADP, making ATP
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Maintaining the solute concentration and temperature of this extracellular fluid is an important part of homeostasis:
a. interstitial fluid b. blood c. urine d. lymph e. water
What is the purpose of flowers?
A. to attract pollinators B. to support gamete production C. to capture wind-blown pollen D. to protect reproductive structures E. All answers are correct.
A large watermelon fruit is very heavy and contains nearly 90% water. Since the skin of a watermelon is thick and lacks stomata, transpiration does not "pull" water into the watermelon. So, how does all that water get into the fruit?
A. Root pressure pushes water into the watermelon. B. Water is pumped in by active transport. C. Water enters by osmosis from the soil. D. Water is transported in the phloem along with the sugars while they are being translocated into the fruit. E. Watermelons, like other fruit, contain an abundance of xylem.
If you took a plant that was accustomed to bight light and moved it into a dark area, you would expect transpiration to
1) Increase 2) Decrease 3) Stay the same