Which systems are involved with the breakdown and delivery of nutrients from recently eaten food to the cells and the removal of waste materials from the body? A. excretory, skeletal, and digestive
B. digestive, circulatory, and excretory
C. excretory, circulatory, and nervous
D. digestive, nervous, and endocrine

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.

Which best describes this behavior? it is beneficial only to the males that do not fertilize eggs. it is beneficial only to the female workers that are not fertilized. it is beneficial to each one of the individual colony members. it is beneficial to the whole species, but not to all of the individual members.

Which type of landform forms at the plate boundary as a result of divergent stress