a model of sea ice coverage is made with sketches and diagrams. it shows that ice cover increased in the antarctic and decreased in the arctic from june to july. what type of model is this?
a conceptual model a mathematical model a physical model a theoretical model

b. the carbon cycle ensures living things have a source of hydrogen

hey, what do you need . just post the question and i may be able to you : )

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.