Explain how diet plays a role in host susceptibility to infection
What will be an ideal response?
Answer: Diet alters the normal flora, allowing opportunistic pathogens a better chance of multiplying and increasing the overall susceptibility of the host to known pathogens. Also, the presence of a particular substance in the diet can trigger disease. For example, Streptococcus mutans can only produce dextran in the presence of sucrose (leading to attachment of the bacteria and dental caries).
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CAM plants differ from C4 plants in that CAM plants ________ while C4 plants ________
a. none of the choices b. fix carbon in two separate chambers to keep CO2 high near rubisco / fix carbon mostly at night c. produce 3-carbon PGA as the first stable intermediate / produce 4-carbon oxaloacetate as the first stable intermediate d. open stomata and fix carbon using a C4 pathway at night / fix carbon first in mesophyll cells and again in bundle sheath cells
The word gymnosperm means ____
a. covered seed b. active sperm c. naked egg d. naked seed e. covered sperm
In order to verify a hypothesis, scientists ____
a. perform experiments and/or make observations b. consider facts c. establish law d. develop theories e. make predictions
The modification of the DNA of an organism to produce new genes with new traits is most properlycalled:a
bioengineering. b. in vitro gene technology. c. biotechnology. d. recombinant DNA technology. e. genetic engineering.