Which is used as an air pollution indicator?
Which is used as an air pollution indicator?
Show Hint
- Algae
- Fungi
- Bacteria
- Lichens
The Correct Option is D
Solution and Explanation
Lichens are often used as indicators of air pollution, particularly sulfur dioxide pollution. This is because lichens are sensitive to atmospheric changes due to their unique structure and method of nutrient absorption.
Lichens consist of a symbiotic relationship between a fungus and an alga (or cyanobacterium). They do not have typical root systems and receive nutrients and moisture directly from the air. This makes them highly susceptible to pollutants present in the atmosphere, such as sulfur dioxide, which can be detrimental to their health and growth.
Due to their sensitivity, the presence or absence of certain lichen species can indicate the quality of the air in an area. Areas with significant air pollution often have fewer lichen species, whereas areas with clean air may have a diverse and abundant lichen population.
In summary, lichens are utilized as biological indicators for air pollution monitoring, providing valuable insights into environmental conditions.
Top Karnataka PGCET General Awareness Questions
- Read the following Assertion (A) and Reason (R) and choose the correct answer from the given options:
Assertion (A): The digital divide in India is a serious national issue.
Reason (R): The concept of knowledge economy will become a reality when the civil society addresses the issue of digital divide. - In which of the following places is the Vijaya Vittala temple located?
- Consider the following statements:
I. The Constitution of India defines its "basic structure" in terms of federalism, secularism, fundamental rights, and democracy.
II. The Constitution of India provides for judicial review to safeguard the citizens liberties and to preserve the ideals on which the Constitution is based.
Which of the statements given above is/are correct? Consider the following events and arrange them in chronological order using the codes given below:
I. Partition of Bengal
II. Transfer of the capital of the Central Government from Calcutta to Delhi
III. Congress Split
IV. Formation of Muslim League
Arrange the events in chronological order:- According to Winer (2001), blog posts canonically encode in this formation:
Top Karnataka PGCET Indian History and Social Science Questions
- Match the following:
List-I (Year) List-II (Event) a. 1971 ii. Signing of Indo-Soviet Treaty of Peace, Friendship and Cooperation b. 1974 i. Conducted first Nuclear Test c. 1975 iii. Declaration of Emergency d. 1984 iv. Assassination of Smt. Indira Gandhi - Who is the author of the book "The Discovery of India"?
- In which year did India gain independence?
"FDI" means:
The Industrial Policy Resolution of 1948 on which one of the following features?
Top Karnataka PGCET Questions
A sum of Rs. 800 amounts to Rs. 920 in 3 years at simple interest. What would be the amount, if the interest rate is increased by 3%?
- In a 100 m race, A runs at 8 km per hour. A gives B a start of 4 m and still beats him by 15 seconds, what is the speed of B?
- The perimeter of two squares are 40 cm and 32 cm. The perimeter of a third square whose area is equal to the difference of the areas of the two squares is :
In what ratio must water be mixed with milk to gain 20% by selling the mixture at cost price?
- Two pipes can fill a tank in 10 hours and 12 hours respectively, while a third pipe empties the full tank in 20 hours. If all the three pipes operate simultaneously, what is the time required to fill the tank ?