Answer:
7
Explanation:
There are 12 total pairs of ribs. 1-7 are attached directly to the sternum by costal cartilages, making them true pairs. 8-10 are fake pairs, which means they're attached indirectly to the sternum. And 11 and 12 and free floating ribs, meaning they aren't attached.
Answer: B. Lungs
Explanation:
The lungs are the only organ in the body that can float on water.
The R group varies, and it is the carbon-phosphate backbone
Answer:
During meiosis Prophase I, crossing over occurs which increases genetic diversity.
Explanation:
