Which human action would most likely increase the nutrients in an ecosystem?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

What is gene expression control that occurs after the generation of rna

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?