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I belive it's called the Cuticle and it's thinner.
The cuticle is thinner than the epidermis
The cuticle is thicker at the top because it causes the top leaves to absorb more water. More than likely a thicker top is seen in hot and dry climates.
The answer is no, because, on the top of a leaf there is the, cuticle, then the upper epidermis cells underneath, which you can see these, because you can see a sort of jigzaw pattern on the top of the leaf. but on the bottom of a leaf there are tiny, guard cells, a guard cell is a cell that lets in carbon dioxide to the leaf, but only on the bottom of the leaf. if you have ever wondered why a leaf is greener on the top, than the bottom of a leaf, is because, sunlight can easily reach the top of a leaf, this is called photosynthesis, but on the bottom of a leaf, it only gets sunlight from refections from the ground, because the bottom of the leaf does not have any visible contact with the sun.
There is more chlorophyll in the top of the leaf than there is on the bottom
NOPE
The pressure against the dam wall increases at the lower levels than nearer the surface. So I expect the foot of the dam wall to be thicker at the bottom than at the top.
The top of the convex lens is thicker than the bottom.
The top part of the leaf has more chlorophyll than the bottom.
Please note the term Cuticle is used interchangeably between human Anatomy to describe the area above the finger or toe nail, it is also used in Botany to describe the waxy covering of a leaf or thickened skin of fruit; additionally the term is used in Entomology to describe the covering of insectsThis answer refers to the Botanical reference of Cuticle; refer to the related question "What is a cuticle" for the Anatomical definition.Plant cuticles are a protective waxy covering produced only by the epidermal cells of leaves, young shoots and all other aerial plant organs without periderm. The cuticle tends to be thicker on the top of the leaf, but is not always thicker in xerophytic plants living in dry climates than in mesophytic plants from wetter climates, despite a persistent myth to that effect.
Look at the Diabolical Ironclad Beetle, and then tell me that insects are thin. If an insect's proportions were to match an average human's height, then it would generally be thicker than a human.
Because the water pressure at the bottom of the dam is much more than the top.