Describe how crust forming on the surface of lava illustrates the principle that removing heat from a system may result in a change in state.

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

Number and variety of living organisms includes genetic, species, and ecological types

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.