From personal experience, you may have noticed that cut flowers placed in a vase with tap water continue to be "alive" for several days. What is the most likely explanation as to why these cut flowers don't immediately wither and die?
A. The tap water in the vase is an excellent
source of nitrogen.
B. The plant can still take up water from the
vase via an "evaporative pump."
C. Cells in the flower petals continue to carry
out photosynthesis.
D. Cavitation allows for water to still be
transported through the flower stems.
B
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The melon of dolphins and other toothed whales is used for:
a. storage of food. b. protecting the brain. c. focusing sound pulses. d. receiving sound pulses. e. producing sounds.
Which group of Archaea are chemoautotrophic anaerobes that use hydrogen as an electron donor and sulfur compounds as terminal electron acceptors?
A. Thermoacidophiles B. Halophiles C. Methanogens D. Cyanobacteria
Figure 21.19
The organism in the accompanying figure belongs to which group?
A. Excavates B. Alveolates C. Stramenopiles D. Green algae E. Rhizarians
What would happen to the progeny of a cell that proceeded to mitosis and cell division after entering S phase but had not completed S phase? Keep in mind that highly condensed chromatin, including the centromere region, is replicated late in S phase
Explain your answer.