Gastropods have the following characteristics: have a single spiral shell, have internal fertilization, use a radula to scrape algae or to create a hole in the shell of another mollusk. * True
False
Other:

What materials must dams have to produce electricity, and what must occur?

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals

What can happen to an enzyme as tempature rises