Ver time, an iron nail reacts with water to produce iron oxide, or rust. which of the following is a signal that rusting has taken place? a. the release of heat and steam at the area where the mixture occured b. the release of an odor and the presence of bubbles c. the appearance of sparks d. a color change on the nail from silver to reddish-brown

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent  

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.