Which of the following is a shell-less mollusk?
A. a nudibranch
B. a scallop
C. a pulmonate gastropod
D. a chiton
E. a squid
A
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A (n) _____ is an autotroph
a. primary producer c. detritivore b. herbivore d. top carnivore
One problem with using common names is that
a. many organisms may have the same common name. b. many common names may exist for the same organism. c. the common name may vary by language and region. d. all of the above are true.
A key step in the evolution of vascular plants was the ability to produce ____, a strengthening polymer in the walls of
cells that function for support and conduction a. cutin b. chitin c. lignin d. actin e. cellulose
A type of Archaea, known as ________, use hydrogen gas to reduce carbon dioxide to methane.
Fill in the blank(s) with the appropriate word(s).