Which type of leukocyte is involved in killing eukaryotic parasites?
a. monocytes
b. neutrophils
c. eosinophils
d. lymphocytes
e. basophils
ANSWER: c
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Why was it informative for researchers to study the proximate causation of Daphnia switching reproductive tactics in the laboratory?
A) Daphnia in the wild were genetically identical and the laboratory was the only place where Daphnia would reproduce sexually. B) Daphnia could not obtain enough energy in the wild to reproduce sexually. C) Daphnia were no longer available in the wild when the investigations occurred. D) Daphnia were never under high crowding conditions in the wild.
A bacterium that either partially or fully catabolizes an acyl-homoserine lactone will likely disrupt
A) attenuation. B) chemotaxis. C) endospore formation. D) quorum sensing.
Humans provide ecological niches for bacterial populations
A. true B. false
Identifying species based on evolutionary relationships is an example of the ____ concept
a. biological species b. ring species c. clinal variation d. morphological species e. phylogenetic species