Use the drop-down menus to select the correct answers. DNA is packed tightly into . are types of atoms that link one strand of DNA to another. The DNA structure is formally called the .

sexual reproduction produces offspring with novel combinations of genes. species that reproduce sexually must maintain two different types of individuals, males and females, which can limit the ability to colonize new habitats as both sexes must be present.

chemical weathering

explanation:

most community's take hundreds of years to become stable

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.