Blood type
height
Helpful variations accumulate in a species over time by selecting those traits that allow it to better live in the environment it is in.
There is a long list, skin color, Diabetes, hair color, toenail length, lifespan, weight, to name a few.
In science, this sometimes called the survival of the fittest or natural selection.If all individuals in a species are not exactly clones of each other but have small variations in the genes (traits), some will do better when the environment changes. These traits will be 'favored' over other traits.
Traits in a population are determined to be favorable or unfavorable based on how they affect an individual's ability to survive and reproduce in a given environment. Favorable traits increase an individual's chances of survival and reproduction, while unfavorable traits decrease these chances. Natural selection acts on these traits, leading to the evolution of populations over time.
If an animal is in a cold environment, it may grow thick skin or long hair. It may also produce other specialized organs for surviving in the cold weather. ex. a long nose to warm its mouth. Likewise, if an animal lives in a warm environment, then it may have very thin skin or short/no hair. Plus, it may be better adapted to keeping water.
Genetic traits are variations of features passed on to offspring from there parents.
Mutations or variations in organisms create genetic diversity, giving rise to individuals with different traits. Natural selection then acts on these traits, favoring those that provide a reproductive advantage in a particular environment. Over time, this process leads to the accumulation of advantageous traits in a population, resulting in evolutionary change.
Variations in traits within a species originate from genetic mutations, environmental factors, and natural selection.
The four steps of natural selection are variation, competition, survival, and reproduction. First, individuals within a population exhibit variations in traits. Second, these variations lead to competition for resources, where some individuals are better suited to survive in their environment. Third, those with advantageous traits are more likely to survive and reproduce, passing these traits to the next generation. Over time, this process results in the population evolving to better adapt to its environment.
Our genes decide what characteristics we inherit, but the environment can affect how these inherited characteristics develop, like a person could be tall but in their childhood have a poor diet which cause poor growth.
Helpful variations accumulate in a species over time by selecting those traits that allow it to better live in the environment it is in.