AP BIOLOGY

PLANTS

BRYOPHYTES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Peat is obtained from and its uses is-
A
Sphagnum, packing material due to water holding capacity
B
Marchantia, packing material due to water holding capacity
C
Sphagnum, used as food
D
Marchantia, used as food
Explanation: 

Detailed explanation-1: -Peat moss is obtained from Sphagnum which is a type of moss. It is produced by partial decomposition of vegetative matter. It is also used as fuel and in gardening. Due to its high water holding capacity, it is also used as packaging material for trans-shipment of living material.

Detailed explanation-2: -Decomposed and dried Sphagnum is known as peat or peat moss. It is used as a soil conditioner as it helps the soil to increase the water holding capacity.

Detailed explanation-3: -Even though peat moss can hold water well up to 10 times of its weight and is a great supplement to the soil. But when it becomes completely dry, it takes a long time to get the moisture.

Detailed explanation-4: -Moss peat is decayed dried sphagnum moss. It is hygroscopic, i.e. it has the ability to hold water either by absorption or adsorption. Its use as a packing material for sending flowers and live plants to distant places helps to keep flowers and plants fresh.

Detailed explanation-5: -A key to the Sphagnum species’ ability to form and grow in peatlands is their hyaline cells, which are large, dead, tubular cells with strong walls with a capacity to hold water.

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