Which of these does the photograph show?
A. Energy transfers in a food chain
B. Members of two different biological communities
c. All the stages in a life cycle
D. Members of the same biological species

How many major plates cover the earth

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a. control b. hypothesis c. procedure d. system

Anurse is caring for a 42-year-old client who is scheduled for an amniocentesis during the fifteenth week of gestation because of concerns regarding down syndrome. what other fetal problem does an examination of the amniotic fluid reveal at this time?