PLEASE HELP ASAP 100 POINTS REAL ANSWERS ONLY FRESHMAN BIO

The rate at which molecules water and oxygen can enter a cell is determined by the-

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

Which layer of the eye completely surrounds the eye except for a dark, round opening called the pupil? a. sclerab. corneac. retinad. choroidthe answer is a sclera