This category explains mutualism and amensalism, focusing on how species relationships influence population sizes and ecosystem health.
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
