★ First Aid Quiz
If someone is bleeding badly, how long should you put pressure on the wound to slow the blood flow?
A. 10 minutes
B. 20 minutes
C. Until the bleeding stops
D. Never put pressure. Allow the blood to flow freely
Select your answer:
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Sense of Sight › Viewwhat is the outer white layer of the eye?
A. retina
B. pupil
C. melanin
D. sclera
Biotechnology › View
Which of the following is the sac-like structure involved in secretion, plasma membrane repair, cell signaling, and energy metabolism?
A. ER
B. Lysosome
C. Vacuole
D. Vesicle