B2 transpiration and translocation Flashcards
What is transpiration?
Transpiration is the process by which water evaporates from the surface of leaves.
True or False: Transpiration helps in cooling the plant.
True
Fill in the blank: Transpiration mainly occurs through small openings called _____.
stomata
What role do stomata play in transpiration?
Stomata allow for gas exchange and the release of water vapor from the plant.
What is the main driving force behind transpiration?
The main driving force is the difference in water vapor concentration between the inside of the leaf and the outside air.
Multiple Choice: Which factor does NOT affect the rate of transpiration? A) Temperature B) Humidity C) Soil pH D) Wind speed
C) Soil pH
What is the process of translocation?
Translocation is the movement of nutrients and sugars through the plant’s phloem.
True or False: Translocation occurs only in the roots of the plant.
False
Fill in the blank: The main tissue responsible for translocation is called _____.
phloem
What are the main substances transported during translocation?
Sugars (especially sucrose) and other organic compounds.
Multiple Choice: Which part of the plant primarily produces the sugars for translocation? A) Roots B) Leaves C) Stems D) Flowers
B) Leaves
What is the significance of transpiration for nutrient transport?
Transpiration creates a negative pressure that helps pull water and nutrients from the roots up through the plant.
True or False: Both transpiration and translocation are essential for plant health.
True
What is the effect of high humidity on transpiration rates?
High humidity generally decreases the rate of transpiration.
Fill in the blank: The process by which water is absorbed by roots and transported to leaves is called _____.
absorption
Multiple Choice: Which of the following increases transpiration? A) High humidity B) Low temperature C) Strong wind D) Overcast weather
C) Strong wind
What is the term for the loss of water vapor from plant surfaces?
Transpiration
True or False: Translocation occurs in both directions in the phloem.
True
What role do xylem vessels play in plants?
Xylem vessels transport water and minerals from the roots to the rest of the plant.
Fill in the blank: The process that moves water from the roots to the leaves is called _____.
transportation
Multiple Choice: Which factor would decrease the rate of transpiration? A) Increased light intensity B) Decreased temperature C) Increased humidity D) Increased air movement
C) Increased humidity
What is the primary sugar transported in the phloem?
Sucrose
True or False: Transpiration can help in nutrient uptake by creating a suction force.
True
Fill in the blank: Plants lose water through transpiration, which also helps in _____.
cooling
