Q: Define Atom A) a small particle that is the building block of matter

B) two or more atoms that are held together by bonds and act as a unit anything that has mass and takes up space

C) a substance containing atoms of two or more different elements chemically bonded together

D) a substance that consists of only one type of atom

The same agricultural practices are used in every country of the world. select the best answer from the choices provided t f

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.

How has biodiversity on earth changed over time?