3.4 Transport System in Plants Flashcards
What is transpiration?
Transpiration is the loss of water vapor from a plant through the stoma.
How does surrounding temperature affect the rate of transpiration?
Higher ambient temperatures increase the rate of water evaporation, leading to a higher rate of transpiration.
How does light intensity affect transpiration?
Increased light intensity causes stomata to open wider, increasing the rate of transpiration.
How does air humidity affect transpiration?
Lower humidity means less water vapor in the air, which increases the transpiration rate.
How does air movement (wind) affect transpiration?
More air movement blows water vapor away from the stoma, increasing the transpiration rate.
What are the two main types of plant stems shown in the diagram?
Dicot stem and Monocot stem.
What is the function of xylem in the dicot stem?
To transport water and minerals from roots to other parts of the plant.
What is the function of phloem in the dicot stem?
To transport food (mainly glucose) produced by photosynthesis to all parts of the plant.
What is the role of sclerenchyma in the dicot stem?
Provides structural support and strength to the plant stem.
What is the vascular bundle in plant stems?
A group of xylem and phloem tissues responsible for transport within the plant.
How are vascular bundles arranged in dicot vs. monocot stems?
In dicots, vascular bundles are arranged in a ring; in monocots, they are scattered throughout the stem.
What is the function of ground tissue in plant stems?
It supports the stem and stores nutrients and water.
What is the function of xylem tissue?
Xylem tissue transports water and dissolved minerals from the roots through the stems to the leaves and provides support.
What is the function of phloem tissue?
Phloem tissue transports nutrients (glucose) from the leaves to the stems and roots.
What is one function of P (in the cross section of a plant stem)?
Transports nutrients from leaves to other parts of the plant.
Name the structures in plant stems that transport minerals and water.
Xylem.
What will happen to the plant if the bark and phloem rings are removed?
The top of the ring will swell because the food material cannot be transported to the bottom of the ring.
