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 *