ch 7 sh1

Xylem transports ​ (a)   and minerals from the ​ (b)   to the leaves. The mass flow of xylem contents occurs against ​ (c)   . Xylem's lumen is ​ (d)   which reduces the resistance for the mass flow significantly. Unlike many other cells in plants, the xylem wall is made of ​ (e)   which is waterproof and strong.

• water
• roots
• gravity
• hollow
• lignin
• cellulose
• fruits

Which is inversely proportional to the rate of transpiration?

• light intensity

• humidity

• wind speed

• temperature

Which is inversely proportional to the rate of transpiration?

• light intensity

• humidity

• wind speed

• temperature

In which state does water diffuse out of the leaf?

• gas

• liquid

• solid

• aqueous solution

Which ion is needed for chlorophyll production?

• Hydrogen
• Oxygen
• Magnesium
• Nitrates

What is the term that refers to tissues or organs that store or metabolise sucrose and amino acids?

In a short plant, root pressure is strong enough to push the water up the stem.

• true

• false

Label the tissues correctly.

a

b

c

d

spongy

palisade

upper epidermis

vascular bundle

The CORRECT statement to compare between xylem and phloem is ...

• in leaf, xylem located closer to the upper surface, while phloem closer to the lower surface

• all cells forming xylem are alive, while in phloem are dead

• in root, xylem located closer to the outer part, while phloem is in the center

• transport in phloem happen in one-way, while in xylem is two-ways

Compared to collenchyma, sclerenchyma ...

• have thicker cell wall

• is younger

• consists of more cells

• have bigger portion of cytoplasm