The answer is a. internal and made of bones.
The skeleton of the vertebrate is internal (endoskeleton) and it develops within the skin. It is made of bones, relatively rigid structures, joined by more flexible structures.
Answer:
1.Three sentence's
2.Three sentence's
3.has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future.
Three sentence's.
The skin color inherits the sex linked (X-links.)
Pulmonary circulation is the type of circulation that explains the movement of blood from the heart to the lungs and back to the heart again.
Blood that does not carry oxygen originates from the heart and moves to the lungs where it is filled with oxygen. Oxygen filled blood from the lungs travels back to the heart where the oxygen is used up.
The cellular membrane, in the case of cells that don't have a rigid cellular wall, outlines the cell and contains the cytoplasm but it's the cytoskeleton that is more responsible for the shape of a cell, which come in a variety of shapes: squamous, cuboide, colunar, neurons, etc. In cells that do have a rigid cellular wall, such as plant cells, it's the cellular wall that gives it <span>its shape.</span>