Question

compare the lichens on trees near busy roads and trees some distance away​

Answer 1

Answer:

leafy, circular lobes with root like structures (rhizines) where the algal matt is sandwiched between the fungus;

bushy / fruticose, shrub-like small mounds, growing up from the ground or beard-like, small tangles hanging down, attached to the substrate only at their bases, with a circular cross-section and a central algal core; or

crustose, closely adhering to the substrate, e.g. tree bark, stone, with the algae dispersed.

Explanation:

your answer

Lichens are equivalent to an early warning ‘canary’ for chemically sensitive vascular plants. In Europe lichens have been used as sensitive bioindicators of air quality for more than a century. As with most vegetation, lichens show a range of sensitivities to pollutants. Not all lichens are sensitive to a particular pollutant, some can be remarkably tolerant. Among lichens are species that are sensitive to sulphur, nitrogen, acidity, halogens (e.g. fluoride), heavy metals and ozone

thanks for asking brother stay blessed

God bless you

Answer 2

Answer:

:: Lichens wil not grow in cities and road ways.Because use of vehicles is more and there is less no.of trees. There are many factories and industries. So, there is lot of smoke and dust.

:: But in villages there are many trees. Less no.of.vehicles. There is no factories and industries..So, there is no pollution and more lichens