A(n) ________ tree simply represents phylogenetic relationships but does not indicate which organisms are more primative relative to others. In contrast, a(n) ________ tree gives a node that serves as the common ancestor and shows the development of the species from this origin.
Fill in the blank(s) with the appropriate word(s).
unrooted, rooted
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Photosynthesis occurs in many branches of the eukaryotic tree
A. true B. false
When you eat a hamburger, you are the
A. primary consumer. B. decomposer. C. producer. D. secondary consumer. E. tertiary consumer.
Which of the following best explains the expectation that asexually reproducing rotifers would have greater sequence differences in the two alleles of a gene than sexually reproducing rotifers?
A. The two alleles of a gene do not recombine in asexual reproduction and thus different mutations accumulate on the two alleles. B. Mutations occur more frequently in asexually reproducing animals than sexually reproducing animals. C. Sexually reproducing organisms evolve more rapidly than asexually reproducing organisms. D. Asexual reproduction increases population sizes more rapidly than sexual reproduction, so more differences accrue. E. All of the answer options are correct.
Sea stars, otters, and beavers through their influence on prey populations and habitat modification are considered ____ species
Fill in the blank with the appropriate word.