Cells of the epidermis are linked together via __________ which rivet the plasma membranes of the two cells together with a network of fine proteins and intercellular cement.
A) desmosomes
B) tight junctions
C) gap junctions
D) voltage gated ion channels
Ans: A) desmosomes
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Which muscle inserts on the clavicle and the acromion and spine of the scapula?
A) serratus anterior B) levator scapulae C) sternocleidomastoid D) pectoralis minor E) trapezius
What does the umbilical vein carry?
A) metabolic wastes and carbon dioxide from the fetus to the placenta B) metabolic wastes and carbon dioxide from the placenta to the fetus C) oxygen and nutrients from the fetus to the placenta D) oxygen and nutrients from the placenta to the fetus E) blood from the navel into the inferior vena cava
Flow of air
A) is directly proportional to the resistance, and flow decreases as the pressure of the system increases. B) is directly proportional to a pressure gradient, and flow increases as the resistance of the system increases. C) is directly proportional to a pressure gradient, and flow decreases as the resistance of the system increases. D) is directly proportional to the resistance, and flow increases as the resistance of the system increases. E) None of the answers are correct.
Diagram the sequential changes in the coral reef death spiral, and explain the positive feedback process that promotes the accelerating growth of seaweed following the death of coral polyps in a bleaching episode
What will be an ideal response?