Name two passageways in the floor of the skull for major blood vessels that serve the brain.

The two passageways in the floor of the skull for major blood vessels that serve the brain are ( a ) Jugular formen  ( b ) Carotid Canal

Explanation:

The two passage ways on the floor of the skull for major blood vessels that serve the brain are jugular foramen this foramen is for the passage of the cranial nerves and jugular vein which drains blood from blood and carotid canal by which internal carotid artery delivers oxygenated blood to brain .

A ) JUGULAR FORAMEN :- passageway for cranial nerves & jugular vein, which drains blood from brain.

B ) CAROTID CANAL :- internal carotid artery delivers oxygenated blood to brain.

answer:

i don't believe the ocean is purple, but it might once have been:

as for the sky, according to nasa:

"sunlight reaches earth's atmosphere and is scattered in all directions by all the gases and particles in the air. blue light is scattered more than the other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time."