12 public questions tagged with this topic.
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
Bacteriophages are viruses that infect bacteria. They are usually double-stranded DNA viruses, and their nucleic acid is protected by a protein coat called the capsid.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Viruses Viroids Prions and Lichens
