Answer:
Red blood
Explanation:
The bluish color of veins is only an optical illusion. Blue light does not penetrate as far into tissue as red light. If the blood vessel is sufficiently deep, your eyes see more blue than red reflected light due to the blood's partial absorption of red wavelengths.
Answer:
D. Refusing to take an antibiotic for a viral infection
Explanation:
Both types of tissues are made of differentiated cells that have a specific function.
Both types of tissues contain cells that lost the ability to divide
Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.
