Tree rings occur when _____
a. there are droughts during the time the rings form
b. environmental conditions influence xylem cell size
c. heartwood alternates with sapwood
B
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In the adaptive immune response, effective immunity cannot be detected for several days after the first contact with the pathogen
Indicate whether the statement is true or false.
Why is the process of peer review critical to scientific inquiry?
a. It protects scientists from being sued. b. It gives scientists a patent for their ideas and methods. c. It helps ensure that the research in a scientific paper is original, significant, logical, and thorough. d. It provides a venue where scientists can publish their materials and protocols for use by other scientists who want to do the same research.
An agent that can cause disease is a(n)
a. infectivore. b. protozoan. c. disruptor. d. pathogen. e. antibody..
Please select each of the common reservoirs of rabies listed below.
> Canines > Skunks, raccoons, and badgers > Birds > Bats > Reptiles