Mechanisms

Can you choose the correct antifriction bearings composition?

• The inner ring, the outer ring, the rolling elements

• The inner ring, the outer ring, the rolling elements, the stopper

• The inner ring, the outer ring, the rolling elements, the retainer

• The inner ring, the Rolling elements, the retainer

The picture is an example of…

• Spring

• shock absorber

• buffer

• damper

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A bike handlebar is a lever type…

• 3

• 2

• 1

• 4

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This is one of the mechanisms of evolution; it occurs when individuals move into or out of a population, either by physically arriving or leaving, or by being born or dying

• Gene flow / genetic drift

• Founder effect

• Natural selection

• Microevolution

This is one of the mechanisms of evolution; it is a continuous process in which organisms with traits that make them better-adapted to their environment are more likely to survive and reproduce than organisms without such adaptations

• Directional selection

• Microevolution

• Gene flow / genetic drift

• Natural selection

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This is the process that ultimately creates new variations and changes in DNA; leads to the creation of new alleles

• Mutation

• Microevolution

• Natural selection

• Gene flow / genetic drift

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Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington's Disease, because the Dutch colonists happened to carry that gene with unusually high frequency.

• Gene flow

• Natural Selection

• Bottleneck Effect

• Founder Effect.

• gene flow

• natural selection

• bottleneck effect

• founder effect

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• Gene flow

• natural selection

• bottleneck effect

• founder effect

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A bee carrying pollen from one flower population to another flower population.

• gene flow

• natural selection

• bottleneck effect

• founder effect