The most likely reason for the development of resistance against pesticides in insects damaging a crop is
- Genetic recombination
- Directed mutations
- Acquired heritable changes
- Random mutations
The Correct Option is D
Solution and Explanation
Top Questions on energy flow through ecosystems
- The total energy fixed by a green plant is called:
- CUET (UG) - 2024
- Biology
- energy flow through ecosystems
- Identify the incorrect statement regarding the flow of energy between various components of the food chain.
- KCET - 2023
- Biology
- energy flow through ecosystems
- In a forest ecosystem, transfer of energy in a food chain:
A. Lion
B. Deer
C. Vulture
D. Plants
E. Fungi & bacteria
Choose the correct answer from the options given below:- CUET (PG) - 2023
- Biology
- energy flow through ecosystems
- Pyramid of energy in an ecosystem is always -
- CUET (PG) - 2023
- Biology
- energy flow through ecosystems
- An ecosystem has
A. Plants are the first trophic level
B. Primary consumers are always carnivore
C. Primary and secondary consumers are herbivore
D. Secondary consumers are carnivore
E. Tertiary Consumers are the fourth trophic level
Choose the most appropriate answer from the options given below:- CUET (PG) - 2023
- Biology
- energy flow through ecosystems
Questions Asked in NEET exam
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
- NEET (UG) - 2025
- Moment Of Inertia
- Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs.
- NEET (UG) - 2025
- Animal Physiology
- Given below are two statements:
Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.
Statement II: Fig wasp and fig tree exhibit a mutual relationship as the fig wasp completes its life cycle in the fig fruit and the fig fruit gets pollinated by the fig wasp. - An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure drops to 11 atmospheric pressure at temperature \(27^\circ\)C. The mass of the oxygen withdrawn from the cylinder is nearly equal to: [Given, \(R = \frac{100}{12} \text{ J mol}^{-1} \text{K}^{-1}\), and molecular mass of \(O_2 = 32 \text{ g/mol}\), 1 atm pressure = \(1.01 \times 10^5 \text{ N/m}^2\)]
- NEET (UG) - 2025
- Ideal-gas equation and absolute temperature
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
Concepts Used:
Ecosystem
An ecosystem is a structural and functional unit of ecology where the living organisms come in to interact with each other and the surrounding environment.
Structure of the Ecosystem:
The structure of an ecosystem is distinguished by the organization of both biotic and abiotic components. This involves the distribution of energy in our environment. It also comprises the climatic conditions prevailing in that particular environment.
There are two main components of the structure of an ecosystem, namely:
- Biotic Components
- Abiotic Components
The biotic and abiotic components are interconnected in an ecosystem. It is an open system where the energy and components can flow through the boundaries.