True or False: Altruism occurs when an individual reduces his or her own fitness and increases the fitness of another individual
A. true
B. false
A
Biology & Microbiology
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In electron transport systems, the electron carriers are membrane associated
Indicate whether the statement is true or false.
Biology & Microbiology
______ release the cytokines IL-1 and TNF, which activate _________.
A. Helper T cells, B cells B. Macrophages, complement C. Helper T cells, antigen presenting cells D. Macrophages, helper T cells E. Non-antigenic cells, CD4 cells
Biology & Microbiology
Ringworm is a skin infection with a fungus, not a worm! In this case, the fungus acts as a
a. decomposer. b. parasite. c. pathogen. d. predator
Biology & Microbiology
Which of the following produce organic acids that may contribute to weathering of rocks?
A. arctic plants B. mosses C. aerial plants D. water plants E. lichens
Biology & Microbiology