A scientific investigation begins with certain observations. By seeing these observations, a question is made. To answer the question, a hypothesis is generated. A hypothesis is a tentative statement that can either be stated s correct or wrong. To test the hypothesis, experiments are made and results are deduced from the experiments. Based on these results, a hypothesis can be proved as correct or wrong. These results are then communicated to check for their authenticity.
As animals move up in the food chain they start to have larger competition for food with other animals, deer compete with elk and even rodents that eat the same food as them. They must fight for food and survival.
Amines, these are simple molecules. proteins and peptides which are made from chains of amino acids. steroids which are derived from cholesterol. That’s the way girls and boy hormones differ
I suggest you to provide some options, as it's quite difficult to answer your question. Here is your answer: A long bone is covered externally with a sheath called the periosteum, whereas the marrow cavity is lined with the <span>endosteum</span>. I've attached the illustration to make it clear for you
