Salt crystals look like tiny cubes. salt is part of the crystal system

the answer is d (apex) good luck : ))

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

because photosynthesis could not occur (apex)