which statements are accurate? check all that apply.
layer c is younger than layer a.
layer b is younger than layer a but older than layer d.
layer d has an older relative age than layer c.
if a geologic event tilted these layers, layer b would no longer be the oldest.
it is possible to determine the absolute age of layer c with the information given.

Which events are likely to be catastrophic to an ecosystem? select the three correct answers.a-hurricane.b-steady population growth.c-seasonal flooding.d-introducing of an aggressive invasive species.e-tsunami.

Which must be kept in mind when determining if an explanation is correct? check all that apply.which must be kept in mind when determining if an explanation is correct? check all that apply.

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?