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Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of

Monjur Alahi

Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of 

(a) algae and bacteria 

(b) algae and fungi 

(c) bacteria and fungi 

(d) fungi and mosses


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Salim Ahmed Kawsar

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(b) In organisms called lichens, a chlorophy llcontaining partner, which is an alga, and a fungus live together fungus provides shelter, water and minerals to the alga and, in return, the alga provides food which it prepares by photosynthesis.

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Mycorrhizal association exists between fungi (Glomus sp) and roots of higher plants. How is this association beneficial to each member ?

The Glomus helps the plant in absorption of essential nutrients / phosphorus from the soil , and the plant in turn provide the fungus with energy yielding carbohydrate

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The sum of four consecutive even numbers. A, B, C, and D is 180. What is the sum of the set of next four consecutive even numbers ?

(b) A + A + 2 + A + 4 + A + 6 = 180 4A + 12 = 180 A = 42. Next four consecutive even numbers are 50 + 52 +...

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During the process of ecological succession the changes that take place in communities are:

a. Orderly and sequential

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The Ashoka major rock edicts which tell us about the Sangam Kingdom include rock edicts:

(c) The ll and xlll rock edicts mention the southern kingdoms of Chola. Pandya, Satyaputra, Keralaputra and Tambapanni.

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In the grasslands, trees do not replace the grasses as a part of an ecological succession because of

(c) The trees cannot replace the grasses as a part of an ecological succession because of water limits and fire.

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Which of following is/are tend (s) in ecological succession ?

(c) 1, 3 and 3

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Which of following is/are tend (s) in ecological succession ? 1. An increase in complexity of species

(c) 1, 3 and 3

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Moss invades and establishes itself on bare rock, accumulating the beginnings of soil.

(b) facilitation.

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In 1888, Sir Syed Ahmed founded the (a) Patriotic Association (b) Upper Indian Mohammadan Association

(a) Patriotic Association  

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The two micro-organisms which live in symbiotic association in lichens are (a) fungus and protozoa

(d) alga and fungus

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