The mass extinction that was most likely caused by the formation and retreat of glaciers was the extinction.
cretaceous-tertiary
end triassic
permian-triassic
late devonian
ordovician-silurian

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?