Movement in multicellular animals is dependent on:
A. a mucous coating
B. the action of muscle cells.
C. cilia and flagella.
D. movement of mitochondria.
B
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Which of the following relationships between cell structures and their respective functions is NOT correct?
A. chloroplast: photosynthesis B. cell wall: support, protection C. mitochondria: formation of ATP D. ribosomes: site of protein synthesis E. Golgi apparatus: breakdown of macromolecules
Initiation factors are ____ that assist in the initiation of transcription
a. mRNAs b. proteins c. tRNAs d. amino acids e. snRNPs
You are examining a rigid plant tissue; it does not flex or bend. Tests show that it is not consuming oxygen gas, as would be expected if aerobic respiration were occurring. This tissue is probably
A) collenchyma. B) phloem. C) epidermis. D) sclerenchyma. E) parenchyma.
The process by which WBCs move out of blood vessels is known as?
a. Migration b. Diapedesis c. Coagulation d. Cytokinesis