Advertisements
Advertisements
Question
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
Options
It will decline
It will stabilise
It will increase
It will first decline and then stabilise
Advertisements
Solution
It will increase
APPEARS IN
RELATED QUESTIONS
During .............. typs of interaction, both organisms are benefited
- mutualism
- competition
- commensalism
- parasitism
Describe the mutual relationship between fig tree and wasp and comment on the phenomenon that operates in their relationship.
Competition and Mutualism.
Give one example of mutualism.
The cattle egret and grazing cattle in close association is a classic example of ______.
Define population growth. Explain different types of age pyramids.
Musk deer is an example of ______
Mycorrhizae are the example of ______.
The presence or interference of one species leads to reduction in feeding efficiency of other species is termed as
What is mycorrhiza?
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 ______.
A Tight one-to-one relationship between many species of fig tree and certain wasps is an example of ______.
"Abingdon tortoise in Galapagos islands became extinct within a decade on introduction of goats in the island." Explain giving reason.
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 are the special adaptations that endoparasites show?
The diagram given below shows the life cycle of a malarial parasite. Study it carefully and answer the questions that follows:
- Name the hosts in which the asexual phase and sexual phase of the life cycle takes place.
- Identify the infective stage labelled ‘D’.
- Name the structure labelled ‘A’ and ‘E’.
- Give any one symptom of malaria.
Explain one type of mutualism.
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.
