Some students, during a study, caught, marked and released 80 fishes in a pond. Later 100 fishes were caught at random. Among these 40 were found to be marked. What is the approximate number of fishes in the pond?
- 50
- 100
- 200
- 4000
The Correct Option is C
Solution and Explanation
Top Questions on organisms and populations
- What do ‘a’ and ‘b’ represent in the following population growth curve?
- NEET (UG) - 2024
- Biology
- organisms and populations
Match List I with List II.
List I (Interacting species)
List II (Name of interaction)
A Leopard and a Lion in a forest/grassland I Competition B A Cuckoo laying egg in a Crow’s nest II Brood parasitism C Fungi and root of a higher plant in Mycorrhizae III Mutualism D A cattle egret and a Cattle in a field IV Commensalism Choose the correct answer from the options given below
- NEET (UG) - 2023
- Biology
- organisms and populations
Match List I with List II:
List I (Interaction) List II (Species A and B) A. Mutualism I. +(A), O(B) B. Commensalism II. –(A), O(B) C. Amensalism III. +(A), –(B) D. Parasitism IV +(A), +(B) Choose the correct answer from the options given below:
- NEET (UG) - 2023
- Biology
- organisms and populations
- Match List I with List II.Choose the correct answer from the options given below:
List I
List II
A Logistic growth I Unlimited resource availability condition B Exponential growth II Limited resource availability condition C Expanding age pyramid III The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups D Stable age pyramid IV The percent individuals of pre-reproductives and reproductive age group are same - NEET (UG) - 2023
- Biology
- organisms and populations
- In the exponential growth model equation
\( dN/dt = rN \)
'N' stands for:- CUET (UG) - 2023
- Biology
- organisms and populations
Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Photosynthesis in higher plants
- Match the following column I with column II.
- AIIMS - 2019
- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- evolution
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
- Gravitation
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Transcription
Concepts Used:
Organisms and Populations
Organisms:
An attached living system that lives in an environment is commonly known as an organism. These organisms are able to retain certain behaviors and structures. Some examples of organisms are plants, animals, bacteria, fungi, and humans. A group of these organisms leads to the formation of a population. The collection of the population forms a community that assists in the operation of ecosystems.
Each and every organism has the ability to adapt itself to various conditions of the environment. This capacity of organisms is due to their genetic variations. It is due to this only that their probability of survival get increases. For instance, camels adapt themselves to survive in desert areas and polar bears adapt to the extreme cold conditions or situations through their dense fur coat.
Populations:
A collection of organisms or individuals of a species that live, at a specific time, in a geographical area that is well-defined and capable of interbreeding is described as a population.
Read More: Organisms and Populations