Walking through the botanical garden with a friend, you spy a rare and beautiful variety of Hosta. "Oh I would love to have one of those!" you exclaim. "But they cost a king's ransom." Your friend smiles, snips off a tiny piece of the shoot, and says, "I'll grow you one. I'll just take it back to lab and..."
Ranking Questions
__ "wait for somatic embryos to form..."
__ "grow up a callus..."
__ "culture an individual plantlet for you..."
__ "use enzymes to break down the cell walls..."
3 "wait for somatic embryos to form..."
2 "grow up a callus..."
4 "culture an individual plantlet for you..."
1 "use enzymes to break down the cell walls..."
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The rRNA gene sequences of hyperthermophilic Archaea and Bacteria have diverged ________ over time, likely due to ________
A) relatively little / strong constraints on sequence changes at higher temperatures B) substantially / higher mutation rates at higher temperatures C) relatively little / low mutation rates in these ancient organisms D) substantially / DNA damage at higher temperatures
Which of the following terms refers to the change in
relative day length? a. phytoerythrin b. phototropism c. photorhythmic d. photochrome e. photoperiodism
In feedback inhibition, the inhibiting molecule is often the
a. substrate of the inhibited enzyme. b. product of the inhibited enzyme. c. first unique molecule in the pathway. d. end product of the pathway.
Bacteria in phylum Fusobacteria are anaerobes that predominantly ferment sugars as their source of fuel, often producing butyric acid as an end product that smells rancid in culture.
Answer the following statement true (T) or false (F)