A gene is
A) a stretch of DNA coding for a polypeptide chain (sequence of amino acids).
B) a microscopic, threadlike body within a cell.
C) any heritable behavioral, morphological, or physiological trait of an organism.
D) all of the DNA in a cell.
A
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If water passed over the gills of fish in the same direction as blood flow through the capillaries in lamellae, how would gas exchange be affected? Select all correct choices
A. More oxygen would diffuse from the water into the fish's bloodstream. B. Less oxygen would diffuse from the water into the fish's bloodstream. C. More carbon dioxide would diffuse out of the fish's bloodstream into the water. D. Less carbon dioxide would diffuse out of the fish's bloodstream into the water. E. Gas exchange would remain the same, regardless of the direction of water flow.
Provisioning services ____
a. are critical functions that preserve and recycle resources upon which ecosystems depend b. transfer CO2 to a nutrient compartment in the biosphere c. enable populations to function within their food webs d. describe the availability of plants, animals, and other materials useful to all organisms e. involves planting crops for use by many organisms
What is the organic constituent of soil called?
a. clay b. gravel c. humus d. sand e. silt
Differentiate between basic and applied research and discuss how the two are linked in terms of genetics. What will be an ideal response?