Peptidoglycan is a compound in ____.
A. bacterial flagella
B. bacterial cell walls
C. archaean cell walls
D. archaean flagella
E. eukaryote cell walls
Answer: B
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Prior to Darwin's book On the Origin of Species, people thought what about species?
A. Species changed over time because they were not adapted to their environment. B. Species were designed already perfectly adapted to their environment. C. Species evolved at one point, but no longer changed because they were not adapted to their environment. D. Species changed over time as guided by a divine creator.
The polymerase chain reaction (PCR) is used as a tool for
A. breaking down DNA for analysis. B. amplifying the amount of DNA to provide a large sample. C. fragmenting DNA into smaller pieces. D. rearranging the gene sequences in isolated fragments of DNA. E. extracting DNA from nuclei.
Which organ system is NOT required for the maintenance of homeostasis within an organism?
a. excretory system b. reproductive system c. skeletal system d. endocrine system e. lymphatic system
What is the total fertility rate and the replacement fertility rate? How are they related?
What will be an ideal response?