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Yes, Females hearts beat faster than mens hearts because they have more sympathetic nerve imput to their hearts.
Mutualism is a biological interaction between individuals of two different species, where both individuals derive a fitness benefit, for example increased survivorship. Similar interactions within a species are known as co-operation.
Stabilizing Selection
an individuals ability to multiply its genes.
reduce the overall fitness of individuals due to reproductive isolation
The Fitness Works website contains Fitness information for a variety of individuals, from kids, to seniors. It gives tips for working out, and also provides information about their personal training programs.
depends on the individuals CV fitness
individuals seeking a more personalized workout
reduce the overall fitness of individuals due to reproductive isolation
Stabilizing selection
Differences between individuals may affect differences in their average reproductive success, causing the variant traits of individuals that have greater reproductive success (fitness) to become more prevalent in a given environment than rival traits. As environments change, so may the traits that have a reproductive advantage change. This is natural selection.
Aerobics refers to cardi-resp. fitness & anaerobics refer to musclular fitness