HELP ME QUICK!! Which of the following describes how the skin of the integumentary system and the bones of the skeletal system work together in the human body?

A. The skin absorbs nutrients from the external environment and the bones transport them around the body.

B. The skin takes in oxygen from the external environment, and the bones convert it into carbon dioxide.
The skin takes in oxygen from the external environment, and the bones convert it into carbon dioxide.

C. The skin attaches to the bones of the body and relaxes or contracts in order to allow the human body to move.

D. The skin produces vitamin D when exposed to sunlight which helps calcium be absorbed by the bones.

List two new traits (structural or behavioral) that each new species of rat might demonstrate as it adapts to the conditions on two of the four islands. choose only two islands that are described in the lesson. record the island latter and the major habitat feature of the island. then list two new traits each rat subspecies might demonstrate in order to survive the habitat on that island. note: new traits should be unique to that island and be in response to that island’s habitat feature. i cannot remember islands that were names in the lesson so only answer if you have done the lesson (5.13 life science 7b) choose 2 of the islands and describe a structural and a behavioral trait for a rat on each island so 4 total answers, 2 different structurals and 2 different behaviorals, one for each rat for each island

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

If animal agriculture was eliminated, how much grain would become available for human consumption?