Which one of the following annelid structures or events is not correctly paired with its role in locomotion?
A. longitudinal muscles contract-segment becomes thick and short
B. fluid in coelom-provides a hydrostatic skeleton
C. septum-allows each segment to move independently
D. circular muscles contract-segment becomes thin and long
E. chaetae-provides gas exchange surface for body muscles
Answer: E
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During exponential growth, the ____ increases, while the ____ stays the same
Fill in the blank with the appropriate word.
When artificial methods are used to modify living organisms to produce new compounds or perform new functions, what is this process called?
a. bioremediation b. bioradiation c. biotechnology d. biotechnicality
The primary function of external gills in aquatic animals is to
A. relay nerve impulses. B. exchange gases with the water. C. secrete reproductive hormones. D. defend against invading microorganisms. E. transport blood.
Which of the following statements would not be consistent with the theory for the endosymbiotic origin of mitochondria and chloroplasts?
A. Genes encoded within mitochondria and chloroplasts indicate a closer relationship to prokaryotes than do most nuclear genes. B. The composition of the outer membrane of chloroplasts and mitochondria is similar to the plasma membrane of eukaryotic cells. C. Mitochondria and chloroplasts have some enzymes unique to them. D. Mitochondria and chloroplasts have their own DNA enclosed within a nuclear envelope. E. The composition of the inner membrane of chloroplasts and mitochondria is similar to the plasma membrane of prokaryotic cells.