Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of blank 1 . the fossils tell us that polar regions blank 2 .
question 1
a.) carbonization
b.) mineralization
c.) trace fossils
question 2
a.) had a tropical plant that could grow in ice
b.) might of had a different climate in the past
c.) will have abundant vegetation

1 A,  2 B.

Explanation:

1. In carbonization, a thin film of carbon mineral is formed on the fossils, giving them a dark black coloration, which makes us conclude that the fossils observed are an example of carbonization.

2. The presence of tropical swamp plant impressions in polar regions is an indication of a different, likely warmer climate in the past, in the polar regions, because plants commonly grow in similar conditions as their living counterparts and no tropical swamp plants are known that can live in polar regions today. Lichens that live in the tundra are not real plants.

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