The living organism that provides nutrients for a parasite is the
A. prey.
B. host.
C. predator.
D. scavenger.
B. host.
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Which of the following is a likely target for a toll-like receptor (TLR)?
A) tumor necrosis factor B) interleukin IV C) flagellin D) insulin
Soil protists often utilize bacteria as a nutrient source.
Answer the following statement true (T) or false (F)
Which of the following is an autoimmune disease?
A. Glomerulonephritis B. Scarlatina C. Scarlet fever D. Rheumatic fever
Water is an optimal respiratory medium because ____
a. water holds less O2 than air b. O2 concentration in water is affected by solute concentration c. the density of water allows maximal ventilation over the respiratory surface d. O2 concentration in water increases at higher temperatures e. water keeps the respiratory surface wetted