How does a bacteriophage become a transducing phage?
What will be an ideal response?
During the lytic phage life cycle, the bacterial DNA is degraded and, rarely, a piece of bacterial DNA is packaged into a progeny phage head instead of phage DNA. These phages are then transducing phages, which can carry genetic material to other bacteria.
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Carbon and hydrogen have similar electronegativities and combine together to form hydrocarbon molecules. What type of bonds form between these atoms?
A. hydrogen B. ionic C. polar covalent D. nonpolar covalent E. electrostatic
Whisk ferns, club mosses, and horsetails have all the following characteristics in common with ferns except:
A. all of these plants are seedless tracheophyte plants. B. all of these plants produce flagellated sperm. C. all of these plants form antheridia and archegonia. D. all of these plants require free water for the process of fertilization to occur. E. all of these plants have no vascular tissue.
About 1,500,000 bacteria are found in 1 milliliter of water of coastal ocean. How many bacteria will be there in 100 milliliters of water?
a-1.5*10^4 b-1.5*10^5 c-1.5*10^6 d--1.5*10^7 e-1.5*10^8
When chloroplast pigments absorb light, _____.
a. they become reduced b. they lose potential energy c. their electrons become excited d. the Calvin cycle is triggered e. their photons become excited