Question

what is the main difference between density - dependent and density - independent factors? 1 point density - dependent factors are random; density - independent factors are controlled. density - dependent factors vary with population size; density - independent factors do not. density - independent factors are influenced by population size; density - dependent factors are not. density - independent factors only affect small populations; density - dependent factors affect large populations. density - dependent factors affect all populations equally; density - independent factors do not. which of the following are density - dependent factors? 1 point pesticide use drought parasites disease tornados competition forest fires predation

Explanation:

• First question:
• Density - dependent factors, such as competition for resources (when population is large, more competition), predation (more prey may attract more predators), disease (easier to spread in a dense population), and parasitism (higher chance of parasite - host contact in a dense population), change with population size.
• Density - independent factors, like natural disasters (tornados, forest fires), drought, and pesticide use (if it's a widespread application not related to population density of the target species), do not depend on population size.
• Second question:
• Parasites: In a dense population, there is a higher chance of parasite - host contact.
• Disease: Spreads more easily in a dense population.
• Competition: Intensity depends on population size (more individuals, more competition for limited resources).
• Predation: If prey population is large, it may attract more predators.

Answer:

• First question: Density - dependent factors vary with population size; density - independent factors do not.
• Second question: parasites, disease, competition, predation.