Why are seed plants an evolutionary advantage?

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?

Introducing minvasive species to an ecosystem results in an increase in biodiversity is it true or false

Look at the inheritance patterns. what do you notice? can a single offspring inherit both chromosomes from one parent?