Which group of gymnosperms has only a single living representative species?
A. cycads
B. ginko
C. conifers
D. gnetophytes
E. lycopodium
B
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Which of the following would occur if a cell's splicesomes were mutated so they no longer functioned normally?
A. Introns would remain in the mature mRNA. B. Exons would be missing in the mature mRNA. C. Transcription would cease. D. A functional protein would still be produced. E. RNA processing would remain intact.
In the graphs above, the x axis represents _________________ and the y axis represents _________________.
a) number of mates ; number of offspring b) number of offspring ; fitness c) temperature ; number of males or females d) age class ; number of offspring e) number of offspring ; number of mates
What do echinoderms and chordates have in common?
A. endoskeletons B. protostome development C. ecdysis D. dorsal nerve cords
A researcher is studying plant development. She isolates a mutant and discovers that the piece of DNA that is mutated does not code for a protein. However, this piece of DNA is complimentary to a gene known to function in early embryonic plant
development. The mutant she identified most likely functions as a(n) ________. A) microRNA (miRNA) B) transfer RNA (tRNA) C) intron D) ribosomal RNA (rRNA) E) general transcription factor known to regulate many different genes