Female peahens choose a male peacock for mating because of the male's long, colorful tail feathers and their courtship display. This is which type of selection? Select all that apply.
_____ Intersexual
_____ Diversifying
_____ Balancing
_____ Intrasexual
_____ Directional
__X__ Intersexual
_____ Diversifying
_____ Balancing
_____ Intrasexual
__X__ Directional
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Which condition stimulates the gallbladder to contract?
a. a starchy meal b. a fatty meal c. a sugar-laden meal d. a protein-laden meal e. acidic chyme
Duplicated chromosomes linked together at their
centromeres at the beginning of meiosis are appropriately called what kind of chromatids? a. mother b. daughter c. sister d. homologous e. haploid
When a protist possesses two flagella, both are generally used for propulsion. Assuming that a flagellum containing a crystalline rod cannot undulate back and forth, and assuming that two undulatory flagella can produce more effective locomotion than can a single flagellum, which of these organisms should have the least effective locomotion?
a. golden algae b. dinoflagellates c. Euglenids d. Chlamydomonas e. oomycetes
What is the primary stain in Schaeffer-Fulton endospore staining?
What will be an ideal response?