Question

write some characteristics of Lichen​

Answer 1

Answer:

A lichen (/ˈlaɪkən/, LEYE-ken or (USA) /ˈlɪtʃən/, LICH-en) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species[1] in a mutualistic relationship.[2][3][4] The combined lichen has properties different from those of its component organisms. Lichens come in many colors, sizes, and forms. The properties are sometimes plant-like, but lichens are not plants. Lichens may have tiny, leafless branches (fruticose), flat leaf-like structures (foliose), flakes that lie on the surface like peeling paint (crustose),[5] a powder-like appearance (leprose), or other growth forms.[6]

A macrolichen is a lichen that is either bush-like or leafy; all other lichens are termed microlichens.[2] Here, "macro" and "micro" do not refer to size, but to the growth form.[2] Common names for lichens may contain the word moss (e.g., "reindeer moss", "Iceland moss"), and lichens may superficially look like and grow with mosses, but lichens are not related to mosses or any plant.[4]:3 Lichens do not have roots that absorb water and nutrients as plants do,[7]:2 but like plants, they produce their own nutrition by photosynthesis.[8] When they grow on plants, they do not live as parasites, but instead use the plants as a substrate.

Lichens occur from sea level to high alpine elevations, in many environmental conditions, and can grow on almost any surface.[8] Lichens are abundant growing on bark, leaves, mosses, on other lichens,[7] and hanging from branches "living on thin air" (epiphytes) in rain forests and in temperate woodland. They grow on rock, walls, gravestones, roofs, exposed soil surfaces, and in the soil as part of a biological soil crust. Different kinds of lichens have adapted to survive in some of the most extreme environments on Earth: arctic tundra, hot dry deserts, rocky coasts, and toxic slag heaps. They can even live inside solid rock, growing between the grains.

Answer 2

$\huge\mathfrak\red{ANSWER}$

✔A lichen is structurally organised entity consisting of the permanent association of a fungus and an algae.

✔The fungal component of lichen is called Mycobiont and algal component is called phychobiont.

✔Both Mycobiont and phychobiont live in symbiotic association.

For example:

➡Yeast

➡ Mushroom