The structure indicated by the letter "B" above
represents
a. actin.
b. myofibril.
c. myosin.
d. myofilament.
e. muscle fiber
A
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What are the projections on epithelial tissue
found in the upper airways that will help move mucus?
a. cilia b. microvilli c. flagella d. pseudopodia e. none of these
Two organelles that are believed to have once been free-living bacterial cells are ________ and ________.
A. peroxisomes; lysosomes B. Golgi complex; endoplasmic reticulum C. ribosomes; nucleolus D. chloroplasts; mitochondria
If oxygen were present in the Earth's primitive atmosphere, then according to one hypothesis
A. the processes leading to the origin of life would occur. B. organic molecules could not form from inorganic molecules. C. reduction reactions would have been possible. D. None of these answers is correct.
Heat is used to drive the stain into cells in the ________ staining procedure(s)
A) endospore stain B) acid-fast stain C) capsule stain D) Gram stain E) both acid-fast and endospore stains