Methanogens ·extreme halophiles ·lack a nucleus and cell organelles ·cell walls do not contain peptidoglycan these characteristics describe organisms found in what domain?

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.

What are positive impacts of algae? how is it used?