Where's the blow dude i was trying to get sum blow

What are tissues? a groups of tissues that work together b basic units of structure and function c groups of cells that perform the same function d multiple organs that perform a major function

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above