Shells are the exoskeletons of clams, snails and oysters. Hope that helps
The sun gives direct energy and sunlight to the producer. The producer will grow until it reaches adulthood. A consumer will come eat from that said producer and receive its energy.
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.
To know more about direction selection for longer necked giraffes visit:
brainly.com/question/3738222
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ocean - Large bodies of water
current flowing towards equator carry cold water from poles
current flowing away from equator carry warm water from poles
Ex - Humidity
230 is your anwser! sorry bad english
