7. Which is a characteristic of dark matter?* 1 point
it interacts with baryonic matter
it has not been observed directly.
it interacts with electromagnetic radiation.
O
humans can see it
O
Pls help

2. what process do mrna and trna work together to complete? (3 points)

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half

Me the formula cacl2 represents the compound