6.7-6.9 Plant Stuctures Flashcards
What is the primary function of root hair cells?
Uptake water and mineral ions.
Root hair cells are specialized for efficient absorption due to their adaptations.
List two adaptations of root hair cells.
- Large surface area
- Large permanent vacuole
- Mitochondria for energy
These adaptations enhance the cells’ ability to absorb water and nutrients.
What is the main function of xylem cells?
Transport water and minerals from roots to shoots.
Xylem cells are essential for the distribution of vital resources within the plant.
How do lignin deposits affect xylem cells?
They cause cells to die and become hollow tubes.
This structural change allows for efficient water transport.
What structural feature of xylem provides support?
Lignin spirals.
Lignin provides rigidity, helping the plant withstand various stresses.
What is the function of phloem cells?
Transport products of photosynthesis.
Phloem is critical for distributing sugars and other metabolic products.
Name one adaptation of phloem cells.
- Sieve plates for substance movement
- Companion cells supply energy
These adaptations facilitate efficient transport and energy supply.
What is transpiration?
Water loss via leaves and stems, crucial for gaseous exchange.
Transpiration plays a key role in maintaining plant health and nutrient flow.
What is the role of guard cells in relation to stomata?
Control stomata opening/closing.
Guard cells help regulate gas exchange and water loss based on environmental conditions.
Fill in the blank: Guard cells adapt to _______ and light.
water availability.
This adaptation ensures that the plant conserves water during dry conditions.
