Covers ecological concepts, organism interactions, and population-level processes in biological systems.
In amensalism, one species is negatively affected while the other is neither harmed nor benefited.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
In some ecosystems, such as forests, a few large trees support many herbivores, leading to an inverted pyramid of numbers.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
r-selected species reproduce rapidly, produce many offspring, and provide little or no parental care.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
In mutualism, both species benefit from their interaction, as seen in pollinators and flowering plants.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Mutualism is an interaction in which both species benefit, such as pollination.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Amensalism occurs when one species is harmed while the other remains unaffected, as seen in Penicillium inhibiting bacterial growth.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Mutualism is a symbiotic relationship in which both species benefit, unlike parasitism, where one species is harmed.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
K-selected species produce fewer offspring and invest significant parental care to ensure survival.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Amensalism occurs when one species is harmed while the other remains unaffected, such as when a tree releases chemicals that inhibit the growth of nearby plants.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Type III survivorship curves, seen in species like frogs and oysters, have high juvenile mortality but long survival for adults.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Mutualism benefits both species, such as in lichen where fungi provide structure and algae perform photosynthesis.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
Interspecific competition occurs when individuals of different species compete for the same limited resources.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Mutualism and Amensalism
