The correct answer is option (a). Parent material
The soil horizon refers to distinct layers of the soils, which are parallel to one another, but have a different composition from the layer present above and below to it.
The soil horizon can be divided into four different layers. First one is organic layer, which is the topmost layer, below this layer second layer of topsoil is present. Below top soil, subsoil is present. Below subsoil, the bottom most horizon parent material is present.
Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth.
Answer:
I shall oppose to this notion
personally I think that since there no oxygen on mars the extraterrestrial creatures or alien plants may have alternative means of survival even if there ain't water
Cladistics is based on the shared characteristics between organisms and their network of evolutionary relationships
