What are stromatolites?

eukaryotes with nuclei that were formed by a single cell or many cells during the precambrian time

soft-bodied organisms resembling the types of jellyfish, worms, and coral that live in the oceans today

layered mounds of calcium carbonate that were deposited by algae during the precambrian time

(1) which phrase describes an important agricultural change that occurred during the mississippian period? (a) first cultivation of wild grains (b) expansion of marsh elder farming (c) spread of corn agriculture (d) gathering of nuts and berries (2) which group of native americans use northwestern arkansas as it’s traditional hunting grounds? (a) osage (b) quapaw (c) woodland (d) caddo

Ray lo bisects nlm, lm=18, no=4, and ln=10. what is the value of x?

The kind of wood most often used in contemporary furniture is