What feature do the tree, ring, and web of life phylogenetic models share?
a. horizontal gene transfer between prokaryotes
b. all species share a single common ancestor
c. new species evolve from existing species
d. speciation from the exchange of transposons
c. new species evolve from existing species
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Which of the following eukaryotic RNA polymerases is responsible for transcribing nearly all protein-coding genes?
A. RNA polymerase I B. RNA polymerase II C. RNA polymerase III D. RNA polymerase IV E. a complex of RNA polymerase II and III
Which of the following would not be considered an ecosystem service?
a. cleaning the air b. maintaining water cycling c. pollinating plants d. tourism
Which of the following represents the chemical formula for urea?
a. H2N-CO-NH2 b. NH4Cl c. NH3 d. C5H4N4O3
Who discoverd automes and sex chromosomes
What will be an ideal response?