Dead leaf tissue on plants is a condition called:
A. necrosis
B. hyperpigmentation
C. viral mosaicism
D. leaf injury
E. none of the above
A. necrosis
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In animals, meiosis results directly in gamete production, while in plants spores are produced. How are the gametes produced in the life cycle of a plant?
What will be an ideal response?
Nitrate and ammonium are usable forms of nitrogen that plants absorb with their
A. roots. B. stomata. C. roots and leaves. D. leaves. E. stomata and leaves.
Which vessel carries blood from the small intestines to the liver?
a. inferior vena cava b. superior vena cava c. iliac vein d. hepatic vein e. femoral artery
In the nitric oxide signaling pathway, nitric oxide activates an enzyme that can convert many molecules of GTP into molecules of cGMP. cGMP is a small molecule that can diffuse through the cytoplasm and bind to an enzyme called protein kinase G (PKG). Binding of cGMP to PKG leads to a change in the confirmation of PKG that leads to its activation. What type of signaling molecule is cGMP?
A. Adapter protein B. Enzyme C. Second messenger D. Scaffold