Carbon is likely to form an ion because:
A. it's outer orbit is full
B. it has an equal number of protons and electrons
C. it's outer orbit is only half full
D. this question is ridiculous: carbon is not likely to form an ion
D. this question is ridiculous: carbon is not likely to form an ion
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Which of the following is NOT part of the pathway that water and dissolved minerals (i.e., Fe, K, Mg, etc.) follow as they move from the soil into a plant to the xylem?
A. through plasmodesmata B. through phloem C. through apoplastic transport D. through symplastic transport E. between cells
When you pick up your backpack and sling into onto your shoulder, your biceps contract
What must occur for your arm to move back down to your side as you walk away?
a. An antagonistic muscle must contract. b. The tendon connected to the biceps must elongate. c. No muscles must contract. d. Not only must an antagonistic muscle contract, but also the tendon connected to the biceps must elongate
Stomata close when ____ guard cells and they become ____
a. active transport pumps H+ into; turgid b. active transport of H+ stops in; flaccid c. active transport pumps H+ out of; turgid d. active transport pumps H+ into; flaccid e. active transport of H+ stops in; turgid
Glial cells make up approximately what percentage of the nervous system?
a. 50% b. 75% c. 90% d. 10% e. 60%