As a result of immunodeficiency, most infected cats do not show symptoms and have normal life expectancy, however they are prone to developing other infections and certain types of cancer. A retrovirus, such as FIV, inserts a copy of its genetic material into the DNA of a host cell, where it can replicate. FIV is a lentivirus. a specific type of retrovirus that can take months, or even years to incubate, so the virus is slow moving, capable of lying dormant in the body before causing symptoms.
1.1.3 Types of fossils. There are many ways in which a record of an organism can be preserved. Body fossils can occur in many ways, including: unaltered preservation, recrystallization, replacement, permineralization, carbonization, impressions, casts and internal molds..2.2 Other types of fossils. 1  1. Trace fossils. 2  Unlike body fossils, where a portion of the actual organism or its skeleton is preserved, trace fossils are the remains of an organism's activity or behavior. 3  Examples include tracks, trails, burrows, and borings. 4  Trace fossils will be covered in detail in a later lab. 5  2.
Living organisms (including you and me) are composed of the elements carbon, hydrogen, and oxygen. Carbonization is when living tissue leave a carbon film in sediment and rock. Many plant fossils are preserved through carbonization.Soft parts of animals including skin and fur have also been preserved as fossils through the process of carbonization.To illustrate how carbonization works, students will make leaf impressions on paper.any plant fossils are preserved through carbonization. Soft parts of animals including skin and fur have also been preserved as fossils through the process of carbonization. To illustrate how carbonization works, students will make leaf impressions on paper.