Answer a couple of questions on Lichens

Learning Goal: I’m working on a botany multi-part question and need an explanation and answer to help me learn.



Spell Check

Full sentences


Use the summary below as well as the small pdf attached about lichens to answer these 7 questions.


Lichens are unusual creatures. Lichen is not a single organism the way most other living things are, but rather it is a combination of two organisms that live together intimately. Most of the lichen is composed of fungal filaments, but living among the filaments are algal cells, usually from a green alga or a cyanobacterium. In many cases, the fungus and the alga which together make the lichen may each be found living in nature without its partner, but many other lichens include a fungus that cannot survive on its own -it has become dependent on its algal partner for survival. In all cases though, the appearance of the fungus in the lichen is quite different from its morphology as a separately growing individual. The true identity of lichens as symbiotic associations of two different organisms was first proposed by Beatrix Potter, who is best remembered for her children’s books about Peter Rabbit. In addition to her books, she spent time studying and drawing lichens. Her illustrations are still appreciated for their detailed and accurate portrayal of these bizarre organisms. In combination, the lichen symbionts produce a growth form that is unlike either fungi or algae growing alone. Three growth forms are easy to recognize:

Lichen are very sensitive to air quality, and even slightly increased levels of ozone and sulfur dioxides will reduce their metabolic activity. In fact, each of the three major types of lichen is sensitive to differing concentrations of air pollutants. Fruticose lichen is the most sensitive to air quality. In the cases of highly polluted air or air regularly exposed to pollutants, the fruticose will NOT be present. Likewise, crustose is the most resistant to pollutants. It can often be found in areas with elevated levels of pollutants. Finally, foliose is moderately tolerant of air pollutants. The presence of each of these lichen in varying numbers and concentrations can provide substantial relative indicators of air quality.


  1. What is a lichen?
  2. What type of symbiotic relationship does a lichen demonstrate?
  3. Approximately what percentage of the earth’s surface do lichens occupy?
  4. Identify two pollutants that lichens are sensitive to.
  5. Relate lichens to air quality.
  6. Lichen are often the first living organisms to appear in a disturbed area. Why would this be the case?
  7. Lichen prefers to grow in direct sunlight even though it is a fungi-like organism. Why do think they prefer this?
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Choose Us

Quality Papers

We value our clients. For this reason, we ensure that each paper is written carefully as per the instructions provided by the client. Our editing team also checks all the papers to ensure that they have been completed as per the expectations.

Professional Academic Writers

Over the years, our Acme Homework has managed to secure the most qualified, reliable and experienced team of writers. The company has also ensured continued training and development of the team members to ensure that it keep up with the rising Academic Trends.

Affordable Prices

Our prices are fairly priced in such a way that ensures affordability. Additionally, you can get a free price quotation by clicking on the "Place Order" button.

On-Time delivery

We pay strict attention on deadlines. For this reason, we ensure that all papers are submitted earlier, even before the deadline indicated by the customer. For this reason, the client can go through the work and review everything.

100% Originality

At Essay Helper, all papers are plagiarism-free as they are written from scratch. We have taken strict measures to ensure that there is no similarity on all papers and that citations are included as per the standards set.

Customer Support 24/7

Our support team is readily available to provide any guidance/help on our platform at any time of the day/night. Feel free to contact us via the Chat window or support email:

Try it now!

Calculate the price of your order

We'll send you the first draft for approval by at
Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

Essay Helper has stood as the world’s leading custom essay writing services providers. Once you enter all the details in the order form under the place order button, the rest is up to us.


Essay Writing Services

At Essay Helper, we prioritize on all aspects that bring about a good grade such as impeccable grammar, proper structure, zero-plagiarism and conformance to guidelines. Our experienced team of writers will help you completed your essays and other assignments.


Admission and Business Papers

Be assured that you’ll definitely get accepted to the Master’s level program at any university once you enter all the details in the order form. We won’t leave you here; we will also help you secure a good position in your aspired workplace by creating an outstanding resume or portfolio once you place an order.


Editing and Proofreading

Our skilled editing and writing team will help you restructure you paper, paraphrase, correct grammar and replace plagiarized sections on your paper just on time. The service is geared toward eliminating any mistakes and rather enhancing better quality.


Technical papers

We have writers in almost all fields including the most technical fields. You don’t have to worry about the complexity of your paper. Simply enter as much details as possible in the place order section.