The immune response is as important as or even more important than antibiotics in the elimination of Bordetella pertussis from the body
Indicate whether the statement is true or false.
Answer: TRUE
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When a virus has a broad host range,
A. it does not require close contact to infect a new host. B. it can infect many different cell types. C. it can infect many different species. D. the species that the virus can infect are spread over a large geographic distance, potentially causing pandemics. E. it can infect many cell types or species.
Which of the following is found in an open
circulatory system but NOT a closed circulatory system?
a. cavities in body tissues b. capillaries c. a heart or hearts d. a single vascular circuit e. more than one of these is found in an open circulatory system but NOT in a closed circulatory system
The relative abundance of a tree with 100 individuals in a community of 1000 would be
A) 10. B) 1. C) 0.1. D) 100.
Which of the following statements about the cortex is true?
a. It secretes a protective layer of cutin. b. It is at the core of the herbaceous eudicot stem. c. It is filled with cork cells. d. It translocates sugar by means of a pressure gradient. e. It may contain collenchyma and sclerenchyma.