AIIMS 2008
- Exam
- AIIMS
- Year
- 2008
- Subject
- Zoology
- Chapter
- Organisms and Populations
AIIMS 2008 · Zoology · Organisms and Populations
Which of the following statements is incorrect?
Which of the following statements is incorrect?
Options
- ALichen, an association of fungus and algae is an example of mutualism.
- BThose epiphytes which use other plants for support only and not for water or food supply and are examples of commensalism.
- CSea-anemone on hermit-crab is an example of protocooperation.
- DMutualism, protoocoperation, commensalism cannot be included under symbiosis.
Correct answer
D. Mutualism, protoocoperation, commensalism cannot be included under symbiosis.
Step-by-step solution
Symbiosis means "living together". It is a beneficial coaction between two (or more) different species in which one or both the species are benefited and neither species is harmed. Symbiotic relationships are manifested through commensalism, protocooperation and mutualism and are widespread in nature. Commensalism is an association or relationship between two different organisms in which one is always benefitted while the other is neither benefitted nor harmed. This relationship may be permanent or temporary and the benefit derived from the other organism may consist of protection, transportation, living space and food. Protocooperation is a relationship between two species, which is favourable but not obligatory to both. Mutualism is a relationship between two or more individuals of different species in which all are benefitted by one another.