Describe three characteristics of an ideal cloning host for genetic engineering
What will be an ideal response?
Answer: Answers will vary. Characteristics of a host that is easy to manipulate and work with are include the ability to efficiently take up DNA, to contain the necessary genes to encode for enzymes that facilitate replication of the vector, to grow in an inexpensive medium, nonpathogenic, rapid growth, and stability in culture situations.
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Rhodobacter cells perform photosynthesis in the presence of light and grow heterotrophically in the dark. After being cultured in total darkness for multiple generations phenotypic and genotypic changes occur
What phenotypic changes occur and what evolutionary processes are driving them? What will be an ideal response?
Emerging diseases ____
a. are related to lifestyle factors b. are caused by poor diet c. are never caused by viruses d. are caused by pathogens that until recently had limited impact on human health e. include obesity and type 2 diabetes
In the solar panel system presented in the video, which of the following was necessary to generate usable electrical current for a home?
A- Electrical energy had to be stored in batteries for several days. B- DC power had to be converted to AC. C- The electrical energy had to be converted to nuclear energy. D- The heat of the sun had to be used to generate steam.
All of the following are good practices to keep well hydrated during endurance events EXCEPT
a. taking salt tablets and drinking plenty of fluid before the workout. b. drinking freely during the 24 hours before an event. c. consuming 1.5 to 2 cups of fluid 4 hours prior to the event start. d. consuming fluid to replace losses during the workout.