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Biology 1104 Chapter 15 Questions With Complete Solutions
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Biology 1104 Chapter 15 Questions With Complete Solutions
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Biology 1104 Chapter 15 Questions With Complete Solutions3 processes of transferring genetic info to others in same
generation Correct Answer -conjugation
-transduction
-transformation
aerobic bacteria Correct Answer require oxygen for growth
-some bacteria (facultative anaerobes) can switch from aerobic
to anaerobic if oxygen is absent
AIDS Correct Answer Acquired
Immune
Deficiency
Syndrome
Amount of bacterial cells and diatoms in the ocean Correct
Answer about 8,000 million billion trillion (8 × 10^30)
(your body has about 100 trillion cells, but only one-tenth of
those cells are human cells—the remaining 90 trillion cells are
the microbes)
Amount of microbes in you on average Correct Answer -about
400 in your GI tract
-about 500 in your mouth
-nearly 200 on your skin
anaerobic bacteria Correct Answer bacteria that do not require
oxygen to survive
-some bacteria (facultative anaerobes) can switch from aerobic
to anaerobic if oxygen is absent
, antibiotic resistance Correct Answer the evolution of
populations of pathogenic bacteria that antibiotics are unable to
kill (penicillin)
antibiotics in agriculture Correct Answer - Beneficial in short
term
* Promote growth
* Minimize disease
- Pass through food chain to people
-agriculture in the United States uses about 25 million pounds of
antibiotics each year—about eight times more than is used for
all human medicine
Are microbes in bacteria and archaea prokaryotic? Correct
Answer microbes in the domains bacteria and archaea are
prokaryotic
Bacteria Classification/shape Correct Answer -cocci: spherical
bacteria
-bacilli: rod-shaped bacteria
-spirilli: spiral-shaped bacteria
Bacteria Shapes DIAGRAM Correct Answer
Bacteria structure Correct Answer -cell envelope, consisting of
a plasma membrane
-usually, a cell wall, that maintains conditions inside the cell that
are different from conditions outside
-cell envelope surrounds a cytoplasm—the substance that fills
all kinds of cells (including your own)
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