Explanation:
The ribs are a set of twelve bones which form the protective 'cage' of the thorax. They articulate with the vertebral column posteriorly, and terminate anteriorly as cartilage (known as costal cartilage). As part of the bony thorax, the ribs protect the internal thoracic organs.
Answer:
Option A, most closely related to mammals
Explanation:
Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.
All mammals and fish have four chambered heart. The right and left sides of the chambers have restricted entry and hence remain intact from each other
Hence, option A is correct
Lisbon Portugal has had one of the worst
"Z<span>ygospores form in the sexual stage and spores in the asexual stage" is the statement among the statements given in the question that describes these formations. The correct option among all the options that are given in the question is the third option or option "c". I hope that the answer has helped you.</span>
Absorbing CO2 into the blood is a part of the respiratory system!
