What are some of the differences between seals and sea lions?
· True seals have a smooth head with no external ear flaps. This makes seals more streamlined
· True seals do not have an under layer of fur.
· True seals' hind appendages are partially fused. This restricts their movement on land.
· Seal lions have external ear flaps on their streamlined head.
· Sea lions have an underfur pelt.
· Sea lions have a higher range of motion in their flippers. Due to the articulation in their flippers, they are quite mobile on land. This allows them to spend extended periods of time out of the water.
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Some nutrients are biologically active. Photosynthesis only occurs at the surface. Therefor,
a) nutrients deplete with depth b) nutrients deplete at the surface c) nutrients stay the samef
Most _____ coal in Europe and North America is bituminous
A)Permian B)Devonian C)Pennsylvanian D)Silurian E)Cambrian
The effects of ground motion caused by an earthquake do not include ________.
A. soil liquefaction B. permanent land surface displacement C. volcanism D. landslides E. fire
On the accompanying figure, which letter is over the youngest oceanic crust?
A. A B. B C. C D. D E. E