13 public questions tagged with this topic.
Classification helps group organisms based on similarities and differences, making identification and study easier. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
Denitrification is the process by which nitrates are converted back into nitrogen gas by bacteria, releasing it into the atmosphere.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Decomposers break down dead organic matter into simpler inorganic nutrients, making them available for uptake by producers.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Food webs include decomposers, which play a crucial role in recycling nutrients.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Plants cannot absorb nitrogen gas directly from the atmosphere; they depend on nitrogen-fixing bacteria.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Natural selection enhances the survival and reproduction of individuals with beneficial traits, leading to evolutionary changes.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Origin of Life - Theories Miller Urey Experiment
Oparin and Haldane proposed that the first life forms originated from pre-existing non-living organic molecules through chemical evolution.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Origin of Life - Theories Miller Urey Experiment
Jawless fish first appeared during the Ordovician period, marking an important step in vertebrate evolution.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Origin of Life - Theories Miller Urey Experiment
The Big Bang Theory describes the origin of the universe through a massive explosion, leading to the formation of galaxies, stars, and planets.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Origin of Life - Theories Miller Urey Experiment
Hydrogen, being a lighter gas, escaped into space during the early stages of Earth's formation.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Origin of Life - Theories Miller Urey Experiment
Panspermia proposes that life existed in the form of spores in space and was transferred to Earth.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Origin of Life - Theories Miller Urey Experiment
The two-kingdom system did not distinguish prokaryotes from eukaryotes, unicellular from multicellular organisms, or photosynthetic organisms from non-photosynthetic fungi. Many organisms therefore did not fit properly into either Plantae or Animalia.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Five Kingdom Classification and Kingdom Plantae Animalia
