In mammals, the __________ is a temporary center for the formation of blood cells

a. amnion
b. allantois
c. yolk sac
d. chorion
e. archenterons


C

Biology & Microbiology

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A simple reflex arc is made up of a sensory receptor and

(a) a sensory neuron. (b) a motor neuron. (c) an effector. (d) all of the above.

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What was the dependent variable in the peacock butterfly experiments?

a. changing predators b. changing habitats c. painting the wings d. clipping the hindwings e. getting eaten

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Oxytocin from the mother's pituitary gland targets what organ to begin contractions?

A) oviduct B) vagina C) hypothalamus D) uterus E) fimbriae

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Breakdown of ____ part of cell membrane leads to break up of the cell itself.

a. Carbohydrates b. Proteins c. Glycoproteins d. Phospholipid

Biology & Microbiology