Males never give an X chromosome to any of their sons
a. True
b. False
True
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Members of which fungal phylum are also called club fungi?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
Which body plan is characterized by simple gas
exchange mechanisms, two-way traffic through a highly branched, saclike gut, and a thin, flat body with all cells fairly close to the gut? a. cnidarian b. nematode c. echinoderm d. flatworm e. sponge
Halobacterium has a photosynthetic membrane that appears purple. Its photosynthetic action spectrum is the inverse of the action spectrum for green plants
(That is, the Halobacterium action spectrum has a peak where the green plant action spectrum has a trough.) What wavelengths of light do the Halobacterium photosynthetic pigments absorb? A) red and yellow B) blue, green, and red C) green and yellow D) blue and red
The reason coral reefs are among the most productive and successful ecosystems is due to ________.
A. the coral-dinoflagellate mutualistic relationship B. commensalisms C. the lichen mutualistic relationship D. All of the choices are correct.