The efficiency of energy transfer from a lower trophic level to the next highest level is roughly ______.
a. 1%
b. 5%
c. 10%
d. 50%
e. 80%6.
Ans: c. 10%
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The major difference between the endosymbiotic relationship theory and the symbiotic relationship theory is
A. In the endosymbiotic relationship theory the archaeon engulfs the smaller bacterium while in the symbiotic relationship theory the Archaeon and Baterium unite, joining their plasma membranes. B. In the endosymbiotic relationship theory the archaeon and bacterium unite, joining their plasma membranes while in the symbiotic relationship theory the archaeon engulfs the smaller bacterium. C. In the endosymbiotic relationship theory the origin of both mitochondria and chloroplast are explained but the origin of the nucleus is not explained, while the symbiotic relationship theory explains the origin of mitochondria, chloroplast and the nucleus. D. In the symbiotic relationship theory the origin of both mitochondria and chloroplast are explained but the origin of the nucleus is not explained, while the endosymbiotic relationship theory explains the origin of mitochondria, chloroplast and the nucleus. E. Both theories have an explanation for the mitochondria and chloroplast, but the symbiotic theory fails to explain the origin of the nucleus.
The male gametophyte is indicated by
a. A. b. B. c. C. d. D. e. E.
Man's pollution of public water sources includes
a. pesticides. b. fertilizers. c. carcinogenic chemicals. d. radioactive materials. e. all of these.
What term describes the birth of a baby buttocks first?
A) labor B) placental stage C) breech birth D) blue baby