9.1 Transport in the Xylem

Which of the following are responsible for transpiration?
I. adhesion
II. cohesion
III. evaporation
IV. active transport

• I and II only
• I, II and III only
• I, and III only
• I, II, III and IV

Which factor will decrease the rate of transpiration?

• Wind
• Temperature
• Light intensity
• Humidity

Tags

NGSS.MS-LS1-5

What hormone is responsible for the closing of stomata?

• Abscisic Acid
• GA (Gibberellin)
• Auxin
• Phytochrome

What is a halophyte?

• Aquatic Plant

• Heat tolerant Plant

• Salt tolerant plant

• Cold tolerant plant

Which of the following is an adaptation of a xerophyte?

• reduced roots
• hairy leaves
• many stomata
• thin cuticle

Tags

NGSS.HS-LS4-4

Which cells are found in xylem?

• Tracheids
• Sieve Tubes
• Companion cells
• Cambium cells

What BEST defines adhesion.

• Water molecules bonding to each other due to the hydrophobic nature of water.
• Water molecules bonded to other other surfaces due to the transparency of water.
• Water molecules sticking to each other due to the polarity of water.
• Water molecules sticking to other surfaces due to the polarity of water.

Why do plants need to open stomata?
I. To get rid of excess CO₂

II. To allow transpiration
III. To exchange gases with the  environment

• I only
• I and II only
• II and III only
• I, II and III

Why is transpiration an inevitable consequence of gas exchange in the leaf?

• Water creates a hypertonic environment in the leaf, but hypotonic environment everywhere else in the plant

• When stomata open, only molecules containing oxygen may enter or leave the leaf

• When stomata open for carbon dioxide absorption, water vapor leaves simultaneously

• When stomata open for oxygen absorption, water vapor leaves simultaneously

Plant absorbs water through the _________. 

• stem
• roots 
• leaves 
• all of the above

Tags

NGSS.MS-LS1-2