The benefits of biological variation, the benefits of biological variation

Genetic mutations are of great significance in biological evolution. It is the root of biological variation and provides the initial raw materials for biological evolution.

The significance of variation in biological evolution In the process of reproduction, organisms continue to produce various favorable variations, which is of great significance for the evolution of organisms.

The environment on Earth is complex, diverse, and ever-changing. Organisms cannot adapt to changing environments if they cannot mutate.

If there are no hereditary mutations, no new types of organisms will emerge, and organisms will not be able to evolve from simple to complex, from low to high. It can be seen that mutation provides the raw material for biological evolution.

Application of Variation in Agricultural Production In crops, poultry, and livestock, variations that are beneficial to humans sometimes occur. For example, there may be cattle in a herd with better meat quality, or there may be cows that produce more milk. People select such cattle for mass breeding, and after continuous breeding, they can obtain a parent breed with good meat quality or high milk production.

There are some wheat varieties with high yields under high water and fertilizer conditions, but due to the high plant size and poor lodging resistance, when the wind comes, a large area will lodging, which not only affects the yield, but also is not easy to harvest. How can you get a variety that is both high yielding and resistant to lodging? Scientists took advantage of the lodging resistance of an ordinary dwarf wheat to cross this wheat with high-yielding high-stalk wheat, and then selected plants with shorter stalks, lodging resistance and higher yield among the offspring plants for propagation.

After several generations of selective breeding, new wheat varieties with high yield, short stalks and lodging resistance were obtained.

In order to obtain good new varieties, people also use radiation irradiation and drug treatment to change the genetic material in the seeds.

A wide variety of variations occur in the plants into which these seeds develop or in their offspring. It is possible to obtain new varieties of crops by selecting the types of variants that are beneficial to humans for targeted breeding.

Biological mutations.

More adaptable to changes in the environment.

Remove the dross and take the essence.

1.The environment is constantly changing, and most organisms cannot change the environment forever, so only by being able to adapt to the environment can they survive. How can you adapt to the environment?

Since the environment is changing, there is a need for changing genes to adapt to the environment.

2.Although biological mutation may destroy the coordination between organisms and the existing environment, and be harmful to organisms, some genetic mutations may also cause organisms to produce new traits, adapt to the changed environment, and obtain new living space.

3.Whether biological variation is good or bad does not depend on the mutation itself, but on the environment in which the organism is located, there are benefits if it can adapt to the environment, and there is no benefit if it cannot adapt to the environment, but if the organism does not mutate, it is impossible to evolve, and mutation (genetic mutation, chromosomal variation, etc.) is the raw material of biological evolution. All living things in nature are like sailing against the current, and if they don't evolve, they are degrading.

A degraded species can only be eliminated. Evolution is a long process, is a process of continuous accumulation of mutations, although now we can not see the signs of evolution, but it does not mean that there will be no evolution, throughout history, all the surviving species, all after a fierce struggle for survival, this struggle from a biological point of view is essentially a genetic competition, only the species with excellent genes can win, to be qualified to stand at the top of the food chain. If a species wants to survive, it must make its genes adapt to the environment, and if it wants to live a better life, it must make its genes better than the genes of other species, so there is no variation, and it can only be resigned to fate and be controlled by others!

Is that okay?

Biological variation is divided into heritable variation and environmental variation.

Environmental variation increases an individual's viability and makes it more adaptable to the environment, but it is not heritable and therefore has little evolutionary significance for organisms.

Genetic variation can provide material for natural selection, and it is the mutant individuals with superior traits who survive and pass on the variants they carry to their offspring.

Here, heritable variation is random, it has no directionality, and only natural selection can the favorable variation be preserved and the unfavorable variation eliminated.

Therefore, heritable variation provides the material for the evolution of organisms and is the basis of biological evolution, while natural selection is the means and result of evolution.

Provide new materials and opportunities for biological evolution (natural selection).

New species with new traits and greater adaptability are emerging.

The provision of new genes and the continuous selection of genes that are more adaptable to the environment in biological competition are the source of biological evolution.

Biological variation is an adaptation to the natural environment that increases biodiversity.

Mutation produces the raw materials for biological evolution, and without mutation, it will be eliminated by the changing environment.

Mutations that can adapt to the environment will remain, so that the evolution of the species can be promoted!!

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The role of abiotic on living things: The composition of the ecosystem has abiotic components.

Bio-components of producers, decomposers, consumers.

Abiotic components provide energy and matter.

Provide biological matter and energy, light energy is a necessary condition for plant photosynthesis, and inorganic salts maintain plant life activities.

important role. Provide a suitable living environment, nutrients...

After the enzyme undergoes catalysis, it is still an enzyme.

Because enzymes are a catalyst, the chemistry is unchanged before and after the reaction.

It won't change. This chemical catalyst is the same, as long as it is a catalyst, the chemical reaction does not change before and after.

Some can be used in medicine, some can be eaten, and the function of organisms has a lot to do with the environment in which they live, which is also a reason why the environment affects organisms.