In _____ blood flows through two completely separate circuits
a. birds c. fish
b. mammals d. both birds and mammals
D
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Compared to the less developed countries, the highly developed ones have a higher _____
a. death rate c. total fertility rate b. birth rate d. resource consumption rate
Which of the following are protein foods that are complete?
a. hamburger b. beans c. corn d. rice e. more than one of these protein foods are complete
Individuals that are heavy smokers may eventually have trouble clearing the mucous from their lungs because the structures that move fluid along the epithelial lining of the lung become damaged over time. What are these structures called?
A. Flagella B. Cell walls C. Cilia D. Pili
Primary pigment of photosynthesis The primary pigment molecule needed for photosynthesis is
a) sunlight. b) oxygen. c) carbon dioxide. d) glucose. e) chlorophyll a.