Transport - Jamb Biology Past Questions and Answers

Question 31:

• JAMB 1996

the function of lenticels is

A. To remove excess water in plant
B. To absorb water from the atmosphere
C. For gaseous exchange
D. To absorb light
E. To store food

Question 32:

• JAMB 1997

The companion cells are part of the

A. Pericycle
B. Phloem
C. Pith
D. Xylem

Question 33:

• JAMB 1999

The force that holds water together in the form of a stream within the xylem tube is the

A. Cohesion of water molecules to one another by hydrogen bonds
B. Force of gravity attacking the water molecules through the hydrogen bonds
C. Attraction between the water and xylem osmotic force
D. Normal flow of water from the ground with help of gravitational force

Question 34:

• JAMB 2000

Peripherals arrangement of vascular tissues in dicots is a characteristic of the internal structure of the

A. Leaf
B. Petiole
C. Stem
D. Root

Question 35:

• JAMB 2001

Salts and water are absorbed in the roots and transported to leaves by

A. Diffusion through the xylem tissues
B. Osmosis through the phloem tissues
C. Diffusion through the phloem tissues
D. Osmosis through the xylem tissues