What are the steps toward multicellularity, in the correct order?
A) Some cells become gametes, then a colony forms, and finally some cells start to specialize.
B) First a colony of protists forms, then some become gametes, and finally others specialize in various tasks.
C) Some protists start to specialize for specific tasks, then they form a colony with specialists, and finally some specialists become gametes.
D) First a colony of protists forms, then some protists start to specialize in specific tasks, and finally some cells become gametes.
D
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The _____ are two saclike structures that lie above the prostate, behind the bladder, and in front of the rectum in human males.
A. kidneys B. seminal vesicles C. ovaries D. Bartholin glands
The staggering of the collagen trimmers gives the fibrils a striated appearance in the electron microscope.
a. true b. false
________ is a progressive brain disease in which the dopamine-producing neurons in the movement control center of the brain die
Fill in the blank(s) with correct word
Polar molecules are composed of covalently-bonded
A. ions. B. atoms of different electronegativity. C. identical atoms. D. atoms of identical electronegativity. E. carbon atoms.