Home
Class 12
BIOLOGY
Which of these statement/s about lichens...

Which of these statement/s about lichens is/are ture?
I. Lichens are mutually beneficial symbotic associations.
II. They grow extensively in area with high pollution, hence called as pollution indicators.
III. The phycobiont member, algae, is an autotroph and the mycobiont member, fungi, is a heterotroph.
IV. Fungi help the algae harvest sunlight for photosynthesis.

A

II and III

B

I and II

C

I, II and III

D

III and IV

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

In the following questions , a statement of assertion (A) is followed by a statement of reason (R). A: Lichens are mutually useful associations between algae and fungi. R : Lichens do not grow in polluted areas.

Read the given statements about lichens and select the incorrect ones. (i) They represent an example of commensallism. (ii) Algal partner obtains water and mineral salts from the fungus and the fungal partner obtains food prepared by the aiga. (iii) These do not grow in polluted areas. (iv) The mycobiont is usually an Ascomycetes or a Basididiomycetes. (v) The phycobiont is mostly a green alga or a cyanobacterium. (vi) These constitute the pioneer community in case of hydrosere.

Which of the following statements are correct regarding Deuteromycetes? I. Deuteromycetes are called perfect fungi. II. Members of Deutermycetes mycetes were often moved to ascomycetes or basidiomycetes once their sexual stages were studied. III. Large number of (No Suggestions) are decomposers that help in nutrient cycling. IV. Their mycelium is aseptate and unbranched.

Which of the following statements regarding eutrophication are correct ? (i) Eutrophication is the natural ageing of a lake by nutrient enrichment of its water. (ii) Pollutants from human activities like effluents from the industries and homes can radically accelerate the aging process of a lake. This phenomenon is called as cultural or accelerated eutrophication. (iii) The plant nutrients responsible for eutrophication are nitrates and phosphates. (iv) These phosphates and nitrates accelerate the growth of algae, which utilise oxygen and may deoxygenate the water to kill the fish and other aquatic animals.

Match Column -1 with with Column - II. {:("Column-I",,"Column-II"),("(a) Saprophyte",,"(i) Symbiotic association of fungi with plant roots"),("(b) Parasite",,"(ii) Decomposition of dead organic meterials"),("(c) Lichens",,"(iii) Living on living plants or animals"),("(d) Mycorrhiza",,"(iv) Symbiotic assiciation of algae and fungi"):} Choose the correct answer from the options given below: