EVERYDAY SCIENCE

Detailed explanation-1: -Populations are all the members of a species that live in a one area. You are part of the human population for your home town. A freshwater pond has multiple populations, including a population of mallard ducks, and a population of cattail plants growing on the edge.

Detailed explanation-2: -An organism is a single living thing, a population is all of the organisms of the same species in the same place at the same time, a community is all populations in the same place at the same time (all living things), and an ecosystem is the reactions between living and nonliving components in a given area.

Detailed explanation-3: -And while every population pyramid is unique, most can be categorized into three prototypical shapes: expansive (young and growing), constrictive (elderly and shrinking), and stationary (little or no population growth). Let’s take a deeper dive into the trends these three shapes reveal about a population and its needs.

Detailed explanation-4: -These density-independent factors include food or nutrient limitation, pollutants in the environment, and climate extremes, including seasonal cycles such as monsoons. In addition, catastrophic factors can also impact population growth, such as fires and hurricanes.