Which aquatic fern performs nitrogen fixation
- Azoll
- Nostoc
- Salvia
- Salvinia
The Correct Option is A
Solution and Explanation
Top Questions on Plant Kingdom
- The genera which belongs to the family Characeae are:
A. Tolypella
B. Nitella
C. Nigella
D. Chara
Choose the correct answer from the options given below:- CUET (PG) - 2025
- Botany
- Plant Kingdom
- Match the LIST-I with LIST-II
Choose the correct answer from the options given below:List-I (Family/Characteristic, etc.) List-II (Species/Examples) (A) Myrtaceae (I) Psidium (B) Hypanthodium inflorescence (III) Fig (C) Caryophyllaceae (II) Carnation (D) Asteraceae (IV) Inula - CUET (PG) - 2025
- Botany
- Plant Kingdom
- Which of the following is a function of the large central vacuole in plant cells?
- MHT CET - 2025
- Biology
- Plant Kingdom
- Which part of the plant is primarily responsible for the absorption of water and minerals?
- MHT CET - 2025
- Biology
- Plant Kingdom
- Who first classified the plant kingdom?
- AIIMS Paramedical - 2025
- Biology
- Plant Kingdom
Questions Asked in NEET exam
- Given below are two statements:
Statement I: The DNA fragments extracted from gel electrophoresis can be used in the construction of recombinant DNA.
Statement II: Smaller size DNA fragments are observed near the anode while larger fragments are found near the wells in an agarose gel.- NEET (UG) - 2025
- Molecular Biology
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- RNA interference
- Given below are two statements: Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable.
Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repair mechanisms. In the light of the above statements, choose the most appropriate answer from the options given below:- NEET (UG) - 2025
- Structure of DNA and RNA
- A microscope has an objective of focal length \(f_o = 2\) cm and an eyepiece of focal length \(f_e = 4\) cm. The tube length of the microscope is \(L = 40\) cm. If the distance of distinct vision of eye is \(D = 25\) cm, the magnification in the microscope is:
- NEET (UG) - 2025
- Optical Instruments
- Two gases A and B are filled at the same pressure in separate cylinders with movable pistons of radii \(r_A\) and \(r_B\) respectively. On supplying an equal amount of heat to both the cylinders, their pressures remain constant and their pistons are displaced by 16 cm and 9 cm respectively. If the change in their internal energies is the same, then the ratio \(r_A / r_B\) is:
- NEET (UG) - 2025
- Thermodynamics
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.