Which life-form existed on Earth for the shortest period of time?

dinosaurs
trilobites
ammonoids
placoderm fish

*will mark brainliest to first correct answer* photosynthesis led to increasing levels during the later proterozoic eon? a. oxygen b. water c. carbon dioxide d. none of the above

Need will mark ! which features are created by groundwater erosion and deposition? check all that apply. a. stalagmitesb. sinkholesc. rillsd. stalactites e. gullies f. rivers

Construct an explanation about the function of mitosis for multicellular organisms