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Elena L [17]
3 years ago
9

Why is genetic variation within a population essential for evolution?

Biology
1 answer:
klasskru [66]3 years ago
8 0

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.
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Which observation would be the best evidence for a recent founder event or population bottleneck?
Bingel [31]
The best evidence of such phenomena could be a population's genetic variation decrease.
When a population bottleneck occur it means that for some reason (i.e. environmental events) the size of a population is largely reduced. This leads to reduction of the genetic variation in that new smaller population. When a bottleneck occur, the founder effect is normally seen, which is that one population is established by a small group of a previously larger population leading once again the genetic variation, now though with a bigger population, to be very reduced.
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3 years ago
figure 6 DNA, which is made up of atoms of nonmetals, is essential to life. list at least two other substances essential to life
kow [346]

Answer:

Glucose

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Explanation:

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7 0
3 years ago
Which kingdom(s) include both unicellular and multicellular organisms
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The kingdoms that include both unicellular & multicellular are protist & fungi
5 0
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What would happen to the size of the herbivore population if the producer population decreased?
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The relationship of the herbivore and producer organism is directly proportional. This means,when there is a decline in the population of ther producer specie then herbivores will also decrease. This because herbivores are dependent on this type of food for its survivel so in sense, they wouldn't survive without this food source.
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A normal chromosome and its homolog carrying an inversion are given. the dot (•) represents the centromere. normal: a b c • d e
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the centromere is not included in the inversion.

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the structure that will form during synapsis is inversion loop.

These inversions are balanced rearrangements but at the moment of meiosis they cause difficulties in pairing. There is most often formation of a pairing loop. The occurrence of recombination in the inverted segment causes the formation of abnormal gametes by duplication / impairment.

4 0
3 years ago
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