Question

which of the following is incorrect for lichens​

Answer 1

Answer:

d) Statement (d) is incorrect because lichens show very slow growth. Their size and slow rate of growth suggest that some lichens in the Arctic are 4000 years ago.

Answer 2

Complete Question:

which of the following is incorrect for lichens​?

Options:

a. They can be used to make litmus.

b. Some species can be used as pollution indicators.

c. They can grow very fast.

d. Their body is composed of both algae and fungal components.

Answer:

Option c - They can grow fast is the incorrect answer.

• A fungus and an alga work together in symbiotic relationships to create lichens, a sophisticated form of life.
• The fungus, which is the lichen's main partner, is responsible for most of its features, including its thallus shape and fruiting bodies.
• The algae can be either a blue-green cyanobacteria, sometimes known as a blue-green alga, or a green alga.
• Both kinds of algae are present in a lot of lichens.
• Some lichen species are thought to be responsible for turning rocks into soil, aiding in its creation, enhancing its quality, and enriching the soil needed for plant growth.
• Through the fixation of atmospheric nitrogen, lichens contribute significantly to the nitrogen cycle.
• A blue dye called litmus is made from many lichen species, particularly Rocella tinctoria.
• The air pollution caused by sulphur dioxide affects lichens quite strongly.
• There might not be any lichens if sulphur dioxide air pollution is really bad.
• They are susceptible to sulphur dioxide because, when exposed to high concentrations of sulphur dioxide pollution, their effective absorption systems induce a rapid accumulation of sulphur.
• Lichen grows very slowly—less than a millimetre a year—and this characteristic is used to estimate the age of exposed rock.

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