66 public questions tagged with this topic.
The logistic growth model considers carrying capacity, population density, and birth/death rates, but not mutation rate. 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: Biology - Botany portion covering relevant concept.
When a population exceeds carrying capacity, resources become limited, leading to increased competition and mortality.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Competition - Competitive Exclusion
Carrying capacity is not fixed; it fluctuates based on environmental factors such as food supply and habitat conditions.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Competition - Competitive Exclusion
Natural disasters affect populations regardless of their density, making them density-independent factors.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
Natural disasters like floods and earthquakes affect populations regardless of their density, making them density-independent factors.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
Birth rates are influenced by resource availability, as sufficient food and shelter support higher reproduction.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
A predator-prey relationship involves one organism (predator) hunting and consuming another (prey), like a tiger hunting a deer.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
Invasive species often disrupt ecosystem stability by altering food webs, reducing biodiversity, and outcompeting native species.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Predation and Herbivory
K-selected species have slow growth, invest in parental care, and maintain stable population sizes.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Life History Variations and Population Interactions - Overview
Emigration refers to the movement of individuals out of a population, reducing its size.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Life History Variations and Population Interactions - Overview
Predators depend on prey for food, so their population size is limited by the availability of prey.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Life History Variations and Population Interactions - Overview
Predator and prey populations are interdependent and fluctuate cyclically based on each other's numbers.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Life History Variations and Population Interactions - Overview
