Answer:
B. Sternum
Explanation:
The sternum (or breastbone) is a flat bone in the thorax's anterior area. It has a 'T' shape and is located in the center of the chest. The sternum, which is part of the bony thoracic wall, protects the internal thoracic viscera, such as the heart, lungs, and oesophagus.
Here is a picture from the internet.
B - 17
The atomic number always matches the number of protons, or 17 p as listed in the image.
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Answer:
A. movement of molecules across a semipermeable membrane against a concentration gradient with a protein
The nitrogenous base that pairs with Adenine is Thymine.