मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.

Advertisements
Advertisements

प्रश्न

While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.

दीर्घउत्तर
Advertisements

उत्तर

In accordance with their lifestyles, parasites evolved special adaptations such as the loss of unnecessary sense organs, presence of adhesive organs or suckers to cling on to the host, loss of digestive system and high reproductive capacity. The life cycles of parasites are often complex, involving one or two intermediate hosts or vectors to facilitate the parasitisation of their primary host.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 13: Organisms and Populations - LONG ANSWER [पृष्ठ ९६]

APPEARS IN

एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 12
पाठ 13 Organisms and Populations
LONG ANSWER | Q 8. | पृष्ठ ९६

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्‍न

State Gause’s competitive exclusion principle.


An orchid plant is growing on the branch of a mango tree. How do you describe this interaction between the orchid and the mango tree?


What is the ecological principle behind the biological control method of managing with pest insects?


Define the following term:

Commensalism


Mention any two examples where the organisms involved are commercially exploited in agriculture.


Define the Stenothermal organisms.


Lichens showing relationship between alga and fungus is an example of ____________ type of interaction.


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.


There are two optional ways of exploitation one way is parasitism. Which is the other one ______.


What is brood parasitism? Explain with the help of an example.


In a pond, we see plants which are free-floating; rooted–submerged; rooted emergent; rooted with floating leaves; Write the type of plant against the following examples.

  Plant Name Type
a. Hydrilla ______
b. Typha ______
c. Nymphaea ______
d. Lemna ______
e. Vallisneria ______

Give one example for the following type.

Camouflaged animal


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

What happens to an inferior competitor if a superior competitor is present in the same environment?


Given below are two statements.

Statement I - The amount of energy available in an ecosystem increases at each successive trophic level.

Statement II - Transfer of energy from one trophic level to the other follows 10% law.

In light of the above statements, select the correct option given below.


Association between clown fish and sea anemone is ______.


Statement I: Gause’s ‘Competitive Exclusion Principle states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually. 

Statement II: In general, carnivores are more adversely affected by competition than herbivores.

In the light of the above statements, choose the correct answer from the options given below:


Which interaction type is characterized by both species being benefited?


What is the sign convention for competition between two species?


Cattle egrets feeding on insects disturbed by grazing cattle is an example of which population interaction?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×