A bone marrow biopsy is a painful procedure in which marrow is removed from bone and examined. A doctor who performs a bone marrow biopsy most likely wants to observe which of these?
Lymph
leukocytes
interstitial fluid
the thymus

When you aggregate your data, you need to remember a. you'll use this data to parents understand your work. b. everyone should end up looking similar in their development. c. you're looking at the whole group rather than each individual. d. the big picture represents your instructional practices only.