Respiration is a physiological process by which O2 enters the internal environment and CO2 leaves by
diffusing across a __________. Fill in the blank(s) with the appropriate word(s).
respiratory surface
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The tissue type that covers internal and external surfaces of organs, aids in protection, nutrition absorption, and gas diffusion is the _______ tissue.
A. connective B. nervous C. muscle D. epithelial E. All of the answer choices are correct.
RNA differs from DNA in many ways, including
A. DNA contains deoxyribose and RNA contains ribose. B. DNA contains thymine and RNA contains uracil instead of thymine. C. All are correct. D. DNA is double stranded and RNA is single stranded. E. RNA can catalyze some chemical reactions and DNA cannot.
The shape of a virus is determined by
its DNA. its RNA. its envelope. its host. its coat protein organization
Which term refers to the nonselective movement of water and a number of solutes into the excretory system tubules?
a. filtration b. release c. secretion d. reabsorption