The atmosphere and seas of the early Earth lacked oxygen. What kind of organisms could NOT have lived under those conditions?
A. obligate aerobes
B. obligate anaerobes
C. facultative anaerobes
D. chemoautotrophs
E. cyanobacteria
A. obligate aerobes
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Which statement is TRUE regarding fungal spores?
A) Conidia are asexual spores. B) Ascospores are sexual spores. C) Basidiospores are sexual spores. D) Conidia are asexual spores, and both ascospores and basidiospores are sexual spores.
You suspect a region of DNA contains a promoter and wish to confirm that a sequence of interest binds proteins. Which experiment would you use?
A) in situ hybridization B) band shift assay C) pulse-chase assay D) Southern blotting E) northern blotting
What characterizes hybrid breakdown?
a. The sterility of hybrid adults b. The early death of hybrid embryos c. The death during pregnancy of hybrid females d. The death during early life of hybrid embryos e. The sterility of the progeny of hybrid individuals
The vertebrate central nervous system consists of a brain and _________.
Fill in the blank(s) with the appropriate word(s).