A tetraploid plant species (with four identical sets of chromosomes) is probably the result of _________.
a. allopolyploidy
b. hybridization and nondisjunction
c. allopatric speciation
d. autopolyploidy as well as hybridization and nondisjunction
e. autopolyploidy
Answer: e. autopolyploidy
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Solutes move between body compartments by using
A. diffusion. B. ATP-powered active transport. C. transporters. D. facilitated diffusion. E. Solutes use all of these mechanisms to move between compartments.
What features of cephalopods have allowed some species to grow to large sizes relative to gastropods?
What will be an ideal response?
Cnidarians have _______
Fill in the blank(s) with the appropriate word(s).
Which of the following statements correctly describes one of Chargaff's rules regarding DNA?
A. The percentages of adenine and thymine are roughly equal, as are the percentages of guanine and cytosine in the DNA of a given species. B. DNA base composition does not vary between species. C. The percentages of adenine and cytosine are roughly equal, as are the percentages of guanine and thymine in the DNA of a given species. D. DNA has a double helical structure.