Bone contains living cells and organic matter such as collagen, protein, and polysaccharides. however, much of the volume of bone is made up of minerals, which may comprise as much as 65% of bone mass. calcium and phosphate are the most common minerals, with calcium in the form of hydroxyapatite and calcium carbonate. magnesium, hydroxide, fluoride and sulfate may also be present. where do you think the body gets the needed minerals?

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

Which of the following typically characterizes a tropical rainforests

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.