Question

which sources would preserve the soft tissues of an early mammal? check all that apply. amber in russia frozen soil in the arctic shale in virginia sandstone in the badlands foraminifera in the ocean ice sheets in greenland

Explanation:

• Amber in Russia: Amber can preserve soft - tissue fossils. Small organisms (and potentially parts of larger organisms) can be trapped in tree resin which hardens into amber, preserving delicate structures.
• Frozen soil in the Arctic: The cold temperatures in the Arctic can act as a natural preservative. Mammoths, for example, have been found with relatively well - preserved soft tissues in the permafrost (frozen soil) of the Arctic regions.
• Ice sheets in Greenland: Similar to the Arctic permafrost, the extreme cold of the ice sheets can slow down decomposition processes. Organisms (or parts of them) trapped in the ice can have soft tissues preserved.

Shale and sandstone (like in the Badlands) are sedimentary rocks that are more likely to preserve hard - part fossils (bones, shells etc.) through processes like permineralization. Foraminifera are single - celled organisms, and while they can form fossils, they do not preserve the soft tissues of early mammals.

Answer:

amber in Russia, frozen soil in the Arctic, ice sheets in Greenland