Advertisements
Advertisements
प्रश्न
Lichens are association of ______.
पर्याय
bacteria and fungus
alga and bacterium
fungus and alga
fungus and virus
Advertisements
उत्तर
Lichens are association of fungus and alga.
Explanation:
Lichens are an association of algae and fungi. This symbiotic relationship is mutualistic, where the algal component synthesizes organic food, which is utilized by both partners, while the fungal component offers water, minerals, and protection from desiccation and temperature extremes to the alga.
APPEARS IN
संबंधित प्रश्न
Write what do phytophagous insects feed on.
Why do clown fish and sea anemone pair up? What is this relationship called?
State Gause’s competitive exclusion principle.
Name the two intermediate hosts which the human liver fluke depends on to complete its life cycle so as to facilitate parasitization of its primary host.
Name important defense mechanisms in plants against herbivores.
Community is defined as ______.
The number of deaths under ideal conditions is known as ______.
How absolute Natality differs from Realized Natality
Using '-' to depict inhibition and '+' to depict benefit, mutualism between two species can be represented as ____________.
Two species competing for the same resources, avoid competition by choosing different times for feeding, also known as ______
______ is the adaptation of an organism i which it matches its colour with its surroundings to get protected from predators.
Identify the correct pair that exhibits commensalism.
Statement I: If one or two species are lost, it may not affect proper functioning of ecosystem.
Statement II: Loss of key species causes serious threat to functioning of ecosystem. Choose the correct alternative with reference to the above statements
Brood parasitism is best explained by the example of ____________.
Musk deer is an example of ______
Substantiate by giving two reasons as to why a holistic understanding of the flora and fauna the cropland is required before introducing an appropriate biocontrol method.
Rafflesia an arnoldii is an example of ______.
Which type of interaction is represented by the given figure?
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
Give one example for the following type.
Camouflaged animal
Discuss the various types of positive interactions between species.
Name any two categories of organisms that in general are adversely affected by competition.
Carnivorous animals-lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as ______.
Complete the following chart regarding population interaction and re-write:
| Sr. No. | Name of interaction | Interaction between |
| 1. | ? | Plasmodium and Man |
| 2. | ? | Leopard and Lion |
| 3. | ? | Clownfish and Sea-anemone |
Many copepods live on the body surface of marine fish. This relationship is an example of ______.
Observe the graph given below.
|
The graph represents inter-specific interaction between two species of Paramecia competing for the same resource in a culture medium. Paramecium caudatum and Paramecium aurelia were grown in separate cultures as well as in mixed cultures. It was found that each species grew in numbers according to the logistic equation.
|
a) Which species is competitively superior? Support it with the data provided in the graph.
b) State the underlying principle for the above result and name the scientist associated with this principle.
c) Explain the mechanism in which two or more species competing with each other can co-exist.
OR
Graphs A and B shown below depict interaction of two species. Which graph indicates Mutualism? Give reason.
![]() |
![]() |
| A | B |
Give one example of camouflage.



