Which steps are part of the seafloor spreading process ? check all that apply !

The correct answers are:

- A crack forms in oceanic crust;

- New material pushes older rock away from the ridge;

The spreading of the seafloor occurs at the places where there's divergent plate boundary. In this type of boundary, the plates are moving away from one another. As they move away, they leave a gap behind them and the crust is much thinner. Because the crust is much thinner, the magma from the mantle is able to easily push upwards through the cracks created by the high pressures from bellow. As the magma reaches the seafloor it cools off very quickly, thus creating new crust. Because there's constant magma flows coming from bellow, the new material is pushing the older crust away, which is why the youngest crust is found at the mid-ocean ridges, while the oldest at the subduction zones.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

read more on -

explanation: