Base your answers to questions one through three on the geologic cross-section below, which shows rock units one through seven that have not been overturned. Some of the rock units contain New York State index fossils. And uncomfortably exists between rock units five and six. 1. What evidence shown in the cross-section indicates that the basalt rock unit is the youngest rock unit?

2. Bed rock from which entire geologic time period is missing between rock units five and six?

3. Describe one characteristic of volcanic ash layer is an index fossils that make both of them good geologic time markers

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.