Which of the following cells function in both innate and adaptive immunity?

A) Red blood cells
B) White blood cells
C) Skin cells
D) All of the above


Ans: B) White blood cells

Biology & Microbiology

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Germ layers are

A. layers infected with bacteria. B. embryonic layers with different developmental potentials. C. layers of cells surrounding the egg prior to fertilization. D. colonial protists arranged in layers. E. layers of gametes.

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Breaking actin-myosin bonds requires

a. ATP. b. ADP. c. calcium. d. phosphorus. e. sodium

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A filter feeder is an animal that:a

has well-developed teeth for stabbing prey. b. secretes paralyzing venom suspended in saliva. c. has a symbiotic relationship with its host. d. entraps food particles from water. e. feeds on nectar while suspended in air.

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Which of these hormones stimulates the production of milk?

A) Oxytocin B) Prolactin C) Estrogen D) Progesterone E) Colostrum

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