The first cells were

a. autotrophic.
b. parasitic.
c. anaerobic.
d. aerobic.
e. all of these.


Answer: c

Biology & Microbiology

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The cells produced by mitotic divisions are considered to be ____

a. genetically identical b. genetically different c. clones d. similar but not exactly the same e. both genetically identical and clones

Biology & Microbiology

What information does this phylogenetic tree convey?


a. the length of time between speciation events separating these organisms
b. the full taxonomic classification of each organism named in this diagram
c. the order in which distinguishing characteristics evolved among these organisms
d. the relative fitness of each organism listed within its own environment

Biology & Microbiology

Which of items below represents an example of exaptation? a. the use of feathers for flight b. the development of lungs c. antibacterial resistance d. fragrances in flowers e. coloration in peppered moths

What will be an ideal response?

Biology & Microbiology

What are the symptoms of a TB infection?

A. runny nose, sore throat, postnasal drip B. skin rash, fever C. bad cough, chest pain, coughing up blood or sputum D. opportunistic infections, chronic diarrhea E. lethargy, general malaise

Biology & Microbiology