Many genes in the human genome are no longer expressed because mutations have introduced stop codons within the coding sequence or transposons have disrupted gene function. These genes are now considered
A. pseudogenes.
B. homologues.
C. orthologs.
D. paralogs.
Answer: A
Biology & Microbiology
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The ________ are of critical ecological importance because most are endomycorrhizal symbionts of vascular plants.
A. Zygomycota B. Basidiomycota C. Deuteromycota D. Glomeromycota
Biology & Microbiology
A gene created from the fusion of two gene fragments is considered a
A. tumor-suppressor gene. B. proto-oncogene. C. structural gene. D. regulatory gene. E. chimeric gene.
Biology & Microbiology
Answer the question using the accompanying figure. Which branch of this phylogenetic tree identifies a kingdom?
a. C
b. D c. E d. D and E e. C, D, and E
Biology & Microbiology
The most common cause of traveler's diarrhea is
A) Shigella spp. B) Salmonella enterica. C) Giardia lamblia. D) Escherichia coli. E) Campylobacter jejuni.
Biology & Microbiology