somebody help. . can someone please tell me the types of layering in root establishment in plants?.​

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

Explain how organisms could be harmed by high levels of salt from roadways?