Most body heat in endotherms is derived from _____ while most body heat in ectotherms is derived from ______.
A. metabolic processes, metabolic processes
B. metabolic processes, their environment
C. their environment, metabolic processes
D. their environment, their environment
E. fur, insulating scales
B. metabolic processes, their environment
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Put the following events in the correct sequence for a protein that will be secreted from the cell
A. SRP binds to the growing polypeptide chain and to the ribosome. B. Translation resumes. C. SRP binds to its receptor. D. The signal sequence is cleaved. E. Protein synthesis begins in the cytosol. F. Translation pauses.
A test tube filled with sugar and yeast made a balloon fill with gas. what is a valid conclusion?
a) yeast cells use sugar to make CO2 by anaerobic respiration b) yeast cells use water to produce CO2 through photosynthesis c) yeast cells use O2 to make CO2 through anaerobic respiration
The Scaphopoda
a. Lack a shell b. Lack a mantle c. Live in fresh water d. Pursue prey in a manner similar to squid e. Lack gills
West Nile virus has the following characteristics, except
A. it causes a hemorrhagic fever. B. it causes a severe encephalitis in less than 1% of infected persons. C. it is an arbovirus. D. it is transmitted by a mosquito vector. E. it is typically a flu-like illness.