Robert Hooke built his own compound microscope to examine tree bark.
Answer:
1,5,2,3,4
Explanation:
I'm not sure about this, so take this answer with a grain of salt. I think you would fill in the blanks like this: 1,5,2,3,4.
Tissues form when many similar specializes cells come together.
The level of complexity in organisms from smaller to larger are:
Cells, tissue, organ, organ system, and organism finally.
Cells makes up tissue, tissue makes up organ, organs makes up organ systems, and organ systems makes up an organism.
Therefore, if the same type of cells come together, they'll make up tissue.