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Do internal skeletons have bones?

Yes, they do in deed. It's just like how us, humans, also have internal skeletons. Therefore, internal skeletons have bones.


What is a possible evolutionary explanation for how the skeletons can be similar but the functions very different in each of the animals?

Simply put, skeletons are similar because the organisms processing them arose from common ancestry. All mammals for instance, have skeletons that are quite similar because all mammal skeletons arose from common ancestry in the Mesozoic age. These mammal skeletons are used in different manner by the entry of populations of organisms into different environments where individuals were selected along lines of adaptation to those different environments. Then the different populations of mammals arose with the very similar skeletons being used in very different ways. Consider yourself, your dog, and whales to see the similarities in skeletal structure with vast differences in use.


What are three differences that exist among the skeletons?

There are many forms of skeletons for different animals. The differences of the human male and female skeletons are as follows. Several general differences exist between the male and female skeletons. The male skeleton is generally larger and heavier than the female. The female skeleton has a wider breast bone and narrower hips.


What is lithified of tiny marine organisms with skeletons composed of silica?

Diatoms are tiny marine organisms with skeletons made of silica. When these diatom skeletons accumulate and become cemented together over time, they form a type of sedimentary rock known as diatomite or diatomaceous earth.


What are the differences and similarities between skeletons of human beings and chimpanzee?

Due to common evolutionary ancestors and them being genetically close to humans the skeletons are nearly identical. The differences are in bone sizes and dimensional variances such as in the skull, hand and feet.