A climatologist wants to gather data about the composition of the air 35,000 years ago. Where might he find an air sample? A. rock sediments

B. alkennone molecule traces from phytoplankton

C. bubbles in ice core samples

D. tree rings

b por d

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bubbles in ice core samples

Explanation:

When water freezes, air bubbles form inside the ice consistent with the atmosphere that existed at the time when it froze. Ice cores samples in ancient glaciers contain air preserved in bubbles that were formed when the ice layer was formed. Scientists have sensitive instruments that can detect the composition of the air inside the bubbles.

answer; the above statement is (true);

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.