Who established the comparison microscope as the indispensable tool of the modern firearms? Albert Osborn
B
Calvin Goddard
С
Leon Lattes
Hans Gross

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid