1541. At sources, how are sugars transported into the phloem?
A. Passive diffusion
B. Down a water potential gradient
C. Active transport *
D. Through the xylem
1542. Microspores give rise to which structures ?
A. Sporophytes
B. Ovaries
C. Male gametophytes *
D. Tubers
1543. Which of the following processes produces clones ?
A. Vegetative propagation *
B. Gravitotropism
C. Fertilization
D. Heterospory
1544. Which kind of plant movement is quickly reversible ?
A. Gravitotropism
B. Turgor movement *
C. Thigmotropism
D. Root pressure
1545. Which of the following does not pass in or out of the stomata ?
A. Carbon dioxide
B. Oxygen
C. Light *
D. Water vapor
1546. The name frond is given to the leaves of members of one of the class :
A. Gymnosperm
B. Feliciana *
C. Angiosperm
D. None of these
1547. Which of the following plants contains a sporangium capsule made up of stomium and annulus :
A. Selaginella
B. Equisetum
C. Marisela
D. Adiatum *
1548. Of the following , Which one is most advanced ?
A. Anthoceropsida *
B. Bryopsida
C. Hepaticopsida
D. None of these
1549. In hornworts, the band of mersitaematic tissue is found near :
A. Foot
B. Gamete producing region
C. Spore producing region
D. At junction of A and C *
1550. The part of sporophyte which is called sporangium is :
A. Capsule *
B. Foot
C. Stalk
D. None of these