With shorter necks, giraffe ancestors could not reach food-containing branches on tall trees. This resulted in the directional selection of giraffes with longer necks.
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Why is choosing a direction necessary? </h3>
It nearly appears obvious that the giraffe's long neck developed as a result of a lack of food in the lower branches of trees. The giraffe has a significant advantage because it is taller than any other mammal and can feed where few others can.
When compared to modern giraffes, the giraffe's ancient predecessors had a shorter neck. The plants that were lying at a higher level were inaccessible to them. Giraffe phenotypes have changed in various ways, and now have long necks to reach vegetation that is higher up. The extreme form is chosen above other features in directional selection. It was decided to choose the long-necked giraffe over the short-necked.
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A biome is an area of the planet that can be classified according to the plants and animals that live in it. 5 - 12+ Earth Science, Geography, Physical Geography.hope this helps,got it from google !
1) A
2) B
3) B
4) C
5) B
6) C
7) D
8) B
9) A
10) A
Environmental laws help ensure the environment and the economy are equally protected and promoted, not just because we need them both, but because each needs the other.
