Gas exchange in arachnids takes place by tracheal tubes, ____, or both
a. gills
b. mandibles
c. book lungs
d. metanephridia
e. protonephridia
c
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In an Hfr X F- conjugation, ____
a. the Hfr cell can lose chromosomal genes that it transfers to the F- cell b. the donor cell can become a partial diploid
c. plasmid DNA is transferred from the Hfr cell to the F- cell d. chromosomal DNA can be transferred from the F- cell to the Hfr cell e. chromosomal DNA can be transferred from the Hfr cell to the F- cell
Which of the following is the single most important stage when regulating gene expression?
a. translational regulation b. degradation of mRNA c. initiation of transcription d. RNA interference e. removal of masking segments
What is the goal of DNA sequencing?
a. to determine the protein products of particular genes b. to distinguish the exons from the introns c. to determine the precise order of the nucleotides d. to distinguish wild type from mutated DNA
In the IPAT model, A stands for _______________
A. Affluence B. Agricultural demand C. Analysis D. Age structure E. Assessment