What Evidence Have Some Scientists Claimed for Ancient Life on Mars

question 243

Multiple Choice

What evidence have some scientists claimed for ancient life on Mars (although the hypothesis has been strongly disputed by many other scientists) ?

• A) an apparent thumbprint on a rock at the Mars Pathfinder landing site
• B) peroxides in the "soil" (regolith) found by experiments on the Viking landers
• C) microscopic features in a Martian meteorite similar to biologically generated features on Earth
• D) calcium carbonate deposits similar to seashells in a sample of Martian limestone

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Definitions:

Medium of Exchange

An item that is widely accepted in exchange for goods and services, facilitating trade by eliminating the need for a coincidence of wants.

Federal Deposit Insurance Corporation

Insures bank deposits up to $100,000.

Automated Teller Machines

Electronic banking outlets that allow customers to complete basic transactions without the need for a branch representative or teller.

Takeovers

The acquisition of one company by another, in which the acquiring company obtains a controlling interest in the target company.