Which of the following chemical formulas shows a covalent compound? a. co2 b. mgo c. nacl d. hbr

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean