Soils have many different layers called soil profiles

a. true

b. false

True

Explanation:

Soil profiles can also be known as soil horizons. The physical, biological, and chemical factors of the soil differs from layer to layer.

false if you dig in to any type of soil you're bound to find different layers or horizons.Then if you put the horizons together that would make a soil profile

osteogenesis imperfecta (oi) refers to a congenital ailment of bones. in the condition, the bones become brittle or fragile. this ailment is a general result of the defect or mutations in the genes (colia1 or colia2). this mutation results in imperfect collagen formation either in quantity or quality wise.  

there are eight kinds of oi defects, and each kind varies with certain distinctions in symptoms. the usual symptoms include frequent bone fractures, loss of hearing in infants, protruding eyes, discoloration of the white in the eyes, respiratory issues, loosening of the joints, short stature, and other symptoms.