Defend the position that bacteria are both beneficial and detrimental to humans
What will be an ideal response?
On the one hand, bacteria degrade dead materials and return the organics to the soil. In the digestive tracts of humans, bacteria help make vitamins and materials available to humans. As part of the phytoplankton along with protists, bacteria produce an enormous amount of the oxygen for Earth's atmosphere. They have relationships with plants to help them fix nitrogen that plants need for metabolism and survival. On the other hand, some bacteria damage food crops and are responsible for causing disease and death in humans.
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Many aromatic compounds used for growth substrates by bacteria are broken down during high heat autoclaving. Which is the BEST way to sterilize these aqueous solutions?
A) ethylene oxide gas treatment B) gamma irradiation C) 0.2 ?m filter sterilization D) ultraviolet radiation
Which of the following is false about animals?
a. they are multicellular. b. they are heterotrophic. c. they are autotrophs. d. they lack cell walls. e. most can actively move.
Which of the following are symptoms of hypothyroidism?
a) Fatigue b) Weight Gain or increased difficulty in loosing weight. c) Diarrhea d) A and B only e) All of the above
The zig-zags in the Keeling Curve repeat:
What will be an ideal response?