Gene flow is transfer of genes from one population to another. Factors affecting gene flow: 1. Mobility: gene flow is lower in species having low mobility or dispersal. 2. Distance: When there is long distances between populations then it results in low gene flow. 3. Population size: Small population size results in low gene flow. […]
Vision is dominant sense for birds as it helps in safe flight. In most hunted birds that depend on vision, eyes are located to the side of the head that helps in monocular vision. It means each eye scans a separate place. Owls eyes are placed more to the front of head that gives wider […]
1. Seasons are formed because of revolution of the Earth around the Sun. 2. As Earth is tilted at an angle on its axis, one pole is near to the Sun and that hemisphere experiences summer. 3. The other pole that is far from the Sun, that hemisphere experiences winter. Note: The Earth revolves around […]
Nutrition is defined as the process of obtaining nutrients or food and utilising them. It is of two types: autotrophic and heterotrophic nutrition. Autotrophic nutrition is defined as the process in which organisms prepares their food on their own. Heterotrophic nutrition is defined as the process in which organisms obtain their food from other organisms. […]