During a Science lesson, the teacher told the students that unicellular organisms do not have a transport system. Which of the following questions should the pupils ask?
A. Do substances enter unicellular organisms by diffusion?
B. Do substances enter unicellular organisms by transfusion?
C. Do unicellular organisms need only sunlight for survival?
D. Do unicellular organisms produce their own food?
Select your answer:
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Epithelial Tissue › ViewWhich of the following is NOT a main function of epithelial tissues?
A. covering exposed surfaces
B. lining internal passageways
C. producing glandular secretions
D. contracting to produce movement
Cardiorespiratory System › View
After picking up oxygen from the lungs and going back to the heart, the correct order of an oxygenated red blood cell traveling to a muscle from the heart is
A. Vein, capillary, muscle
B. Vein, artery, muscle
C. Artery, capillary, muscle
D. Artery, vein, muscle