I think that the answer is 40...................................
Answer:
The costal cartilage connects the ribs to the sternum. Costal cartilage normally allows forward movement of the ribs, providing flexibility to the chest wall. There are usually 12 pairs of cartilage associated with the rib cage.
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Answer:
In interspecies competition, two species use the same limited resource. Competition has a negative effect on both of the species (-/- interaction). A species' niche is basically its ecological role, which is defined by the set of conditions, resources, and interactions it needs (or can make use of).
The answer is D
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Answer:
properties of carbon responsible for huge number of organic compounds
tetravalency it has a valency of four so one carbon atom can bond with four other atoms or form four bond
