Mitochondria probably developed before the atmosphere was oxygen rich
Indicate whether the statement is true or false.
F
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Proteomic analysis of a microbial community indicated an abundance of phycobiliproteins. Which phototrophic group is likely active and abundant in this community?
A) cyanobacteria B) eukaryotic phototrophs C) green bacteria D) prochlorophytes
A gametophyte that develops from a ____ spore is bisexual, meaning that it can produce both sperm and eggs
a. homosporous b. polysporous c. heterosporous d. diplosporous e. bisporous
Base pairs in DNA are held together by ________ bonds.
A. peptide B. hydrogen C. polar covalent D. nonpolar covalent E. sulfhydryl
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive mutant gene that independently assorts with a recessive gene for hairy (h) body. Assume that a cross is made between a fly with normal wings and a hairy
body and a fly with vestigial wings and normal body hair. The wild-type F1 flies were crossed among each other to produce 1024 offspring. Which phenotypes would you expect among the 1024 offspring, and how many of each phenotype would you expect? A) Phenotypes: wild, vestigial, hairy, and vestigial hairy; Numbers expected: wild (192), vestigial (256), hairy (64), and vestigial hairy (192). B) Phenotypes: wild, vestigial, hairy, and vestigial hairy; Numbers expected: wild (576), vestigial (192), hairy (192), and vestigial hairy (64). C) All wild type. D) All vestigial hairy. E) Phenotypes: wild, vestigial, hairy, and vestigial hairy; Numbers expected: wild (256), vestigial (256), hairy (256), and vestigial hairy (256).