1511. Where is most of the plant’s water supply taken in ?
A. Stomata
B. Root Hairs *
C. Phloem
D. Tubers
1512. Which is not a structure specialized for vegetative propagation ?
A. Tuber
B. Bulb
C. Runner
D. Fruit *
1513. Which of these materials is transported by xylem?
A. Sugar
B. Oxygen
C. Water *
D. Harmones
1514. Which flower structure arises from the corolla ?
A. Petal *
B. Pistil
C. Stamen
D. Sepal
1515. What harmone is involvedin phototropism?
A. Gibberellin
B. Cytokine
C. Auxin *
D. Ethylene
1516. Which of these terms describes the reaction of a plant to touch?
A. Vegetative propagation
B. Photoperiodic
C. Acid growth hypothesis
D. Thigmotropism *
1517. In grafting, What is the twig or bud called that is grafted on to a plant with roots ?
A. Runner
B. Scion *
C. Sporophyte
D. Stock
1518. Which of the following structures do gymnosperms and angiosperms have in common?
A. Ovaries
B. Pollen grains *
C. Stigmas
D. Petals
1519. The epicotyl and hypocotyl comprise which structure ?
A. Embryonic axis *
B. Cotyledon
C. Seed leaf
D. Stamen
1520. From which structures are plant ovaries derived ?
A. Petals
B. Stamens
C. Sepals
D. Carpels *