Answer:
Floating ribs
Explanation:
The thoracic cavity has 12 pairs of ribs evenly distributed on the left and the right sides of the cavity that function to provide surface area for muscle attachment such as the intercoatal muscles that assist in breathing. The ribs are flat shaped bones semi circular in shape attaching to the thoracic vertabrae with a wider. The first to the tenth ribs are linked to the sternum by a cartilage to assist in their epansion and relaxation during breathing. The 11th and 12th ribs have no cartilage that can attach them to the sternum and hence are called floating ribs.
Answer:
Answer B
Explanation:
The traits have to have variation and get passed on to children other wise it cant happen
Bug spray, bed covers, medicine and stay away from areas that carry malaria
Positively charged objects and neutral objects attract each other; and negatively charged objects and neutral objects attract each other.
Answer: Mutualism
Explanation: When two animals help one another in a beneficial way for both parties then it is considered mutualism.
