Which nutritional category do animals and most pathogenic bacteria fall into?
a. chemoheterotrophs
b. chemoautotrophs
c. photoautotrophs
d. photoheterotrophs
Ans: a. chemoheterotrophs
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Natural selection that increases the frequency of a favorable allele is called _____
A. positive selection B. balancing selection C. sexual selection
____ are important as food in parts of Asia, and fed to chickens in Brazil
a. Sea squirts b. Salps c. Larvaceans d. Cephalochordates e. Nudibranchs
The loss of mayflies from a stream suggests that the quality of water is declining; therefore, mayflies are a(n) ____ species.
a. degraded b. endangered c. threatened d. keystone e. indicator
If a cell contains large amounts of rough endoplasmic reticulum (ER), then
A) membrane lipids could be produced by that cell. B) digestive enzymes cannot be manufactured by that cell. C) membrane proteins and phospholipids are lacking in the cell. D) large amounts of protein hormones could be produced and exported by the cell. E) few, if any, enzymes for biochemical processes are manufactured by that cell.