Dietary fiber is an important component of a healthy diet. Which of the following statements is false concerning fiber?
a. Fiber is composed of ground tissue.
b. Soluble fiber dissolves in water and is often used to thicken food products.
c. Insoluble fiber such as wheat bran does not dissolve in water.
d. Insoluble fiber may be particularly healthy, as it binds to cholesterol.
e. Insoluble fiber causes undigested material to pass through the digestive system more rapidly.
D
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If the partial pressure of oxygen outside of a cell is 100 mmHg and the partial pressure of oxygen inside of a cell is 25 mmHg, which of the following statements is correct?
A. There will be a net movement of oxygen from outside the cell to inside the cell. B. There will be a net movement of oxygen from inside the cell to outside the cell. C. There will be no net movement of oxygen in either direction. D. There will be a net movement of carbon dioxide into the cell. E. There will be a net movement of carbon dioxide out of the cell.
Molecular techniques have revealed that ____ caused the loss of forelimbs in snakes
a. the absence of Hoxc6 and Hoxc8 genes in snake genomes
b. selection in dinosaurian ancestors of snakes c. the lack of usefullimbs d. mutations in limb buds e. changes in the spatial pattern of Hoxc8gene expression
Cnidarians do NOT have
a. tentacles equipped with nematocysts. b. three germ layers. c. radial symmetry. d. a saclike gut. e. medusa stages.
Which cellular protein is found in desmosomes?
A) tubulin B) occludins C) dynein D) cadherins E) connexons