An essential amino acid is one that the body cannot synthesize in sufficient amounts
__________________Indicate whether the statement is true or false.
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The function of bacterial endospores is
A. storage of excess cellular building blocks. B. reproduction and growth. C. protection of genetic material during harsh conditions. D. to provide a protected site for photosynthesis.
Which prokaryotic nutritional group uses CO2 and inorganic substances to produce energy?
a. photoautotrophs b. chemoautotrophs c. photoheterotrophs d. chemoheterotrophs e. methanoheterotrophs
A "nucleus" is the name for both the spherical center of a cell and:
A) the gaps between the segments of myelin B) the last cranial nerve C) a collection of cell bodies D) the basal ganglia
Triploblastic refers to animals that
A. form three blastopores in each blastula. B. form three separate blastulas from a single embryo. C. produce three eggs, each of which forms a single blastula. D. have a blastula composed of three cells. E. have three germ layers.