Which of the following is true of microbes?
a. 99% of all microbes are pathogenic.
b. All bacterial enzymes are harmful to humans and the environment.
c. Gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy.
d. Microbes create pollutants and toxins that harm the environment.
Ans: c. Gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy.
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In the above illustration of fluid regulation in a planarian, the letter "A" represents which of the following?
a. nucleus of the flame cell b. small capillaries that allow water to freely diffuse into the planarian c. sexual reproductive organ d. cilia to draw fluid into the planarian e. funnel to collect fluid
All the body fluid located outside of cells is
a. interstitial fluid. b. plasma. c. intracellular fluid. d. extracellular fluid.
Compare and contrast potential and kinetic energy. Give two examples that clarify the differences
between the two. What will be an ideal response?
Which is the correct horizontal pathway of water from the soil to the center of the root?
a. epidermis ? root hair ? cortex ? pericycle ? endodermis ? xylem b. epidermis ? cortex ? pericycle ? endodermis ? phloem ? xylem c. root hair ? epidermis ? cortex ? endodermis ? pericycle ? xylem d. root hair ? cortex ? endodermis ? pericycle ? epidermis ? xylem e. root hair ? epidermis ? endodermis ? cortex ? xylem ? phloem