There are different ways means of selection. Domestication of plants and animals is seen as a form of artificial selection because the process of domestication itself is known to be an artificial form of selection.
- This is because one can easily makes selection of traits based on personal characteristics needed.
It is said to lack the control of fitness needing to increase fitness and as such artificial selection can cause problem traits to be popular among species.
Controlled breeding leads to prezygotic selection which is a key element to domestication. This is due to the fact that captive breeding allows for the strongest, most straightforward artificial selection.
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Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
It connects the continents of North and South America, controls the Panama Canal, is an important trading route.
Answer:
Stage 2 - Pre-conditions for take-off
and
Stage 3 - Take-off
Explanation:
The stage 2 "Pre-conditions for take-off " give emphasis to the mechanisation of agriculture and trading of agricultural produce. In stage 3 “Take-off” Manufacturing industries get importance. The economy rises with rise in industrial production and trading. The focus is shifted to infrastructure development.
