In a commensal relationship between a phoretic species and its "host", the phoretic species is not affected.
Answer the following statement true (T) or false (F)
False
Commensalism is an interaction between species in which one benefits and the other is neither helped nor harmed. One of the best examples of commensalism involves phoresy, in which one organism (the phoretic species) uses a second organism (the host) for transportation. For instance, hummingbird flower mites feed on the pollen of flowers and travel between flowers in the nostrils of hummingbirds. The hummingbird hosts are unaffected but the phoretic mites benefit from the behavior.
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The hormone most involved in triggering abscission is:
a. auxin. b. nitric oxide. c. cytokinin. d. ethylene. e. phytochrome.
Translation of RNA into proteins occurs
A) in the nucleus. B) in the endoplasmic reticulum. C) in the cytoplasm. D) in both the nucleus and the cytoplasm. E) in both the nucleus and the endoplasmic reticulum.
Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly
A. stimulating components of the immune system through the release of cytokines. B. stimulating the production of specific antibodies. C. blocking or reducing the inflammation response in mucous membranes. D. recruiting macrophages to the nasal epithelium. E. lysing virus-infected cells and preventing further propagation of the pathogen.
The terms "acoelomate," "pseudocoelomate," and "coelomate" are used to describe
A. cephalization B. origin of the blastopore C. ectoderm, mesoderm, and endoderm D. the body cavity of animals