HORTICULTURE SCIENCE
PLANT BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
they have thickened fibers that can support no weight
|
|
|
the decrease in the water pressure in the upper parts of plants that is due to the diffusion of water out of stomata into the atomosphere
|
|
|
the increase in the water pressure in the upper parts of plants that is due to the diffusion of water out of stomata into the atmosphere
|
|
|
they have thickened fibers that can support more weight
|
Detailed explanation-1: -As transpiration occurs, it deepens the meniscus of water in the leaf, creating negative pressure (also called tension or suction). The tension created by transpiration “pulls” water in the plant xylem, drawing the water upward in much the same way that you draw water upward when you suck on a straw.
Detailed explanation-2: -During transpiration, water evaporates from tiny holes in the surfaces of leaves into the air. These tiny holes are called stomata. As water molecules evaporate from plant leaves, they attract the water molecules still in the plant, helping to pull water up through the stems from the roots.
Detailed explanation-3: -The water eventually is released to the atmosphere as vapor via the plant’s stomata-tiny, closeable, pore-like structures on the surfaces of leaves. Overall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves is known as transpiration.
Detailed explanation-4: -The process of loss of water by a plant through leaves in a gaseous form is called transpiration. It helps to regulate the temperature by cooling the leaf surface.
Detailed explanation-5: -It moves up through a process known as transpiration. This is when water leaves the through the stomata, creating a negative hydrostatic pressure which pulls the water up through the xylem. The properties of water (also present in Chemistry AS) allow this to happen.