Which of the following statements about the epicotyl is true?
A. It remains in the ground after a seed has germinated.
B. It is the portion of the stem axis that is directly below the cotyledons.
C. The shoot apical meristem of a seedling is located just above it.
D. It takes up most of the volume within a monocot or dicot seed.
E. It forms immediately above the secondary roots of a seedling.
C. The shoot apical meristem of a seedling is located just above it.
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A plant has undergone a robust phase of growth; however, the roots reach a point where they can no longer provide enough nutrients to the plant. What signal(s) can the roots send to the rest of the plant that will prevent new branches from forming?
Select all correct choices. A. cytokinins B. gibberellic acid C. strigolactone D. ethylene
The same basic array of bones is modified to give rise to the wing of a bat and the fin of a porpoise. Such anatomical structures are called:
What will be an ideal response?
When cells metabolize protein, ammonia is formed. An example of an animal that directly excretes ammonia without further modification is a
a. fish. b. bird. c. snake. d. turtle. e. human.
Explain why phosphate buffer needs both NaH2PO4 and Na2HPO4 in order to resist changes in RH.