_____ are suspensions of fine dust or moisture in the air that contain live pathogens, whereas droplets are dried microscopic residues ejected from the mouth and nose.
Fill in the blank(s) with the appropriate word(s).
Aerosols
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________ is to transcription as ________ are to translation.
A. RNA spliceosome; ribosomes B. RNA polymerase; ribosomes C. RNA polymerase; RNA spliceosomes D. DNA polymerase; RNA polymerase E. DNA polymerase; ribosomes
The beating flagellae of ____ maintain a constant flow of water through sponges
a. amoeboid cells b. choanocytes c. sperm d. porocytes e. pinacoderm
Phylogenetic trees are constructed based on morphological characteristics, but molecular phylogenetic trees are constructed based on which feature?
What will be an ideal response?
Which of the following statements is FALSE?
A) A prophage is phage DNA inserted into a bacterial chromosome. B) A prophage can "pop" out of the chromosome. C) Prophage genes are repressed by a repressor protein coded for by the prophage. D) A prophage may result in new properties of the host cell. E) The prophage makes the host cell immune to infection by other phages.