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प्रश्न
Define population.
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उत्तर १
A population is a group of individuals of the same species that are capable of interbreeding and are found in a geographical area. E.g., all the frogs identified as Rana tigrina living in a given pond constitute a population. Similarly, all water hyacinth plants (Eichhornia) growing in that pond form another population. Organisms of the same kind may form several populations inhabiting different geographical areas.
उत्तर २
The population is defined as a group of individuals of a species occupying a definite geographic area at a given time.
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संबंधित प्रश्न
During .............. typs of interaction, both organisms are benefited
- mutualism
- competition
- commensalism
- parasitism
Define the following term:
Interspecific competition
Answer the following question.
Mention the term used to describe a population interaction between an orchid growing on a forest tree.
Name and explain the interaction that is seen between clownfish and sea anemones.
How absolute Natality differs from Realized Natality
Define Niche.
Identify the interspecific interaction in which species A is harmed and species B is unaffected.
Brood parasitism is best explained by the example of ____________.
Identify the interspecific interaction which one species is benefited and other is neither banned nor benefited.
Match the Columns.
| Column A | Column B | ||
| i. | Lice on humans | a. | Endoparasites |
| ii. | Ectoparasites on marine fishes | b. | Grows on hedge plants |
| iii. | Cuscuta | c. | Ectoparasites |
| iv. | Plasmodium and humans | d. | Copepods |
Identify the type of negative interaction.
Which one of the following is NOT an example of mutualism?
With the decline in the population of fig species it was noticed that the population of wasp species also started to decline. What is the relationship between the two and what could be the possible reason for decline of wasps?
Rafflesia an arnoldii is an example of ______.
There are two optional ways of exploitation one way is parasitism. Which is the other one ______.
In spite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?
Define stenohaline species.
Define ectoparasite and endoparasite and give suitable examples.
What is brood parasitism? Explain with the help of an example.
In an association of two animal species, one is a termite which feeds on wood and the other is a protozoan Trichonympha present in the gut of the termite. What type of association they establish?
Give one example for the following type.
Chemical defense agent
Observe the set of 4 figures A, B, C and D and, answer the following questions
- Which one of the figures shows mutualism?
- What kind of association is shown in D?
- Name the organisms and the association in C.
- What role is the insect performing in B?
 Fig. (A) |
 Fig. (B) |
 Fig. (C) |
 Fig. (D) |
Pick out the appropriate association representing brood parasitism.
Write the observations made at the end of Connell's field, experiment on barnacles on the rocky sea coasts of Scotland.
Between which among the following, the relationship is not an example of
?
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 |
A bird laying its egg in the nest of another bird is the type of ______.
"Abingdon tortoise in Galapagos islands became extinct within a decade on introduction of goats in the island." Explain giving reason.
What are the special adaptations that endoparasites show?
Select the statement which best describes parasitism.
Mention the scientific name of protozoan parasite that causes Amoebiasis.
Describe mutualism.
What happens to an inferior competitor if the superior competitor is removed from the environment?
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:
