These 2 identical rods of DNA are called sister chromatids, and they are held together at the centromere.
Cartilage connects the sternum and ribs. There are 7 true ribs, 3 false ribs, and 2 floating ribs. They are all connec
ted to the sternum using cartilage.
Biodiversity is the variety and variability of life on Earth. Many areas within the tropical zones are considered biodiversity hotspots and are home to the world's most rare and endangered species.
C, photosynthesis only occurs in prokaryotic cells.
