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.

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______ 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