Bark is
A) a mixture of primary xylem and primary phloem.
B) a mixture of secondary xylem and secondary phloem.
C) a mixture of primary xylem and periderm.
D) a mixture of secondary phloem and periderm.
E) a mixture of periderm and cork tissue.
Correct Answer:
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Q50: Chlorosis androopeleaves arcauseby a deficiency of
A)nitrogen.
B)potassium.
C)sulfur.
D)phosphorus.
E)magnesium.
Q51: Thoxygen needeby plants is ultimately derivefrom
A)aerobic respiration.
B)photosynthesis.
C)anaerobic
Q52: Lateral meristems
A)are groups of dividing cells.
B)are responsible
Q53: Thnodules founon throots of plants callelegumes
A)are abnormal
Q54: Which of thfollowing elements requireby plants does
Q56: Annual growth rings arformein woody stems principally
Q58: Root hairs arthextensions of the
A)apical meristem.
B)epidermal cells.
C)pericycle.
D)vascular
Q59: In an annual trering, thwoowith largdiameter, thin-wallecells
Q60: Plants in general requirhow many essential elements,
Q73: Mycorrhizae
A) increase plant growth.
B) are symbionts.
C) allow
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