What is the main mechanism in which populations change over time?

Describe darwin's theory of natural selection as the mechanism of evolution?

Short and sweet description. Natural selection is the nonrandom survival and reproductive success of randomly varying organisms. Variation. Struggle for existence. Selection. Heritability of traits. Adaptation of populations to environment. Leading to allele frequency change in populations over time; evolution.

The lack of a mechanism hampered the acceptance of the idea that?

Species change over time

What is evolution and what does it involve?

Evolution is the change in allele frequency over time in a population of organisms; change over time. This is all that it involves and whether the driver of evolution is natural selection, the adaptive driver of evolution, genetic drift, a random process or gene flow between populations, gene frequencies in these populations change and that is all evolution involves. Now, how evolution occurs with it's various drivers is another question for another time.

What role do mutations play in evolution?

They provide the variation in organisms that other recombination methods do not. A beneficial mutation, leading to a small change in same trait, that is even marginally reproductively successful to the organism that possesses it will be selected for and passed on tho progeny thus changing the organisms population over time, regardless of how small the change. This is evolution, change in populations over time.

What is the mechanism that breaks the linkage between linked genes?

crossing over

What is the process by which populations change over time?

Which of the following is the most powerful evolutionary force in large populations over time?

Only natural selection could be the answer here as natural selection is the main driver of adaptive change leading to evolutionary change and speciation in large populations.

Populations change over time due to the process of?

How did the plant populations in the community change over time?

by plants moving

Describe darwin's theory of natural selection as the mechanism of evolution?

Short and sweet description. Natural selection is the nonrandom survival and reproductive success of randomly varying organisms. Variation. Struggle for existence. Selection. Heritability of traits. Adaptation of populations to environment. Leading to allele frequency change in populations over time; evolution.

The lack of a mechanism hampered the acceptance of the idea that?

Species change over time

What do scientist think happens as populations change over time?

new species form.

What happens to a populations alleles as they change one time?

Evolution is the change in the frequency of alleles of a population of organisms over time.

What is the scientific theory of the states that populations change over time in response to changes in the environment?

it is evolution