Answer:
Nicholas Steno
Explanation:
Nicholas Steno who was a Catholic priest establish relationship between sedimentary rock layers otherwise called stratigraphy.
Stratigraphy is a branch of geology that deals with the study of rock layers. He established theoretical law of stratigraphy by introducing law of superimposition, principle of original horizontality and the principle of lateral continuity in 1669 work of fossilization of organic matter sediments.
Answer;
-PET scan
A PET scan uses radioactive markers in the blood to monitor blood flow and metabolic activity via x-ray
Explanation;
-A positron emission tomography (PET) scan is an imaging test that helps reveal how the tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.
-A PET scan is used to diagnose certain health conditions, to plan treatment, to find out how an existing condition is developing, and to see how effective a treatment is.
-In a PET scan, a machine detects radiation that is emitted by a radiotracer. A radiotracer consists of radioactive material that is tagged to a natural chemical, such as glucose.
A change or a slight difference
Nitrogenous bases, double stranded, made of nucleotides, adenine, thymine, cytosine, guanine, A pairs with T, G pairs with C
PHYSICAL DEVELOPMENT involve growth and changes in ......... Physical development in humans starts from infancy up to late adolescent. Features of physical development include: development of motor skills, puberty, development of muscle and physical coordination, etc.