Question

relationship between variations evolution and natural selection ​

Answer 1

Answer:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by: mutation. random mating between organisms.

Explanation:

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Answer 2

QUESTION

⚫RELATIONSHIP BETWEEN VARIATIONS EVOLUTION AND NATURAL SELECTION

ANSWER

VARIATIONS :

THE DIFFERENCES FOUND IN THE OFFSPRINGS FROM THE PARENTS SPECIES IS KNOWN AS VARIATIONS. IT MAY ARISE DUE TO INACCURACIES IN DNA COPYING.

IT ALSO ARISES DURING CROSS IN MEIOSIS.

EVOLUTION :

EVOLUTION IS THE SEQUENCE OF GRADUAL CHANGES WHICH TAKE PLACE IN THE PRIMITIVE ORGANISMS OVER MILLIONS OF YEARS WHICH ULTIMAYELY LEADS TO SPECIATION

HOW VARIATION LEADS TO EVOLUTION:

VARIATIONS ARE THE SHORT TERM CHANGES IN CONSECUTIVE GENERATIONS WHEREAS EVOLUTION IS LONG TERM CHANGE. THESE SHORT TERM CHANGES I.E. VARIATIONS WHICH OCCURS CONTINUOUSLY LEADS TO EVOLUTION.

NATURAL SELECTION:

IT IS THE PHENOMENON BY WHICH THE NATURE SELECTS THOSE SPECIES WHI H POSSESS SURVIVAL ADVANTAGES OVER THE OTHER SPECIES.

HOW NATURAL SELECTION IS RELATED TO EVOLUTION OR VARIATION:

IN NATURAL SELECTION, THE ORGANISM HAVING SURVIVAL ADVANTAGES CAN SURVIVE. SO THE WEAKER PERISH. HENCE IT LEADS TO ARISE OF NEW TYPE OF GENERATION AND FURTHER LEADS TO EVOLUTION.

HENCE WE CAN CONCLUDE THAT VARIATIONS , EVOLUTION AND NATURAL SELECTION ARE INTERRELATED