What advantage is the layer of spongy bone found on the inside of a long bone?

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?

Aclient with dysmenorrhea has been prescribed naproxen 1250 mg po b.i.d. what is the nurse's best action?

Which of your fossils are most likely heterotrophs? which of them are autotrophs? how do you know?