The animals across are a lancelet, lamprey, salmon, lizard, and rabbit. Which synapomorphy is common to the lizard and rabbit but not the salmon?
A. Notochord.
B. Vertebrae.
C. Tetrapod.
D. Mammary glands.
D. Mammary glands.
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A function of which initiation factor is to prevent premature joining of the large and small ribosomal subunits?
A. eIF1A in eukaryotes and IF-1 in bacteria B. eIF2 in eukaryotes and IF-2 in bacteria C. eIF5 in eukaryotes and IF-3 in bacteria D. eIF3 in eukaryotes and IF-3 in bacteria
How do eukaryotic cells maintain underwound DNA?
A. They have a topoisomerase that can introduce negative supercoils. B. They can introduce negative supercoils by wrapping the DNA around proteins. C. They only relax the positive supercoils that form during transcription and let the negative ones accumulate. D. All of these choices are correct. E. None of these choices is correct.
Which concept reflects the increasing numbers of species present in an area that includes a wide variety of habitats,
vegetation types, and small-scale environments?
a. landscape ecology b. the species-area relationship c. conservation biology
d. alpha-diversity e. beta-diversity
The muscular ring at the base of the uterus is the ________.
Fill in the blank(s) with the appropriate word(s).