Robert Koch and His Colleagues First Used Agar in Bacteriological

question 47

Multiple Choice

Robert Koch and his colleagues first used agar in bacteriological media.Why was this ingredient an improvement on previous materials used to culture bacteria?

• A)Agar can convert from liquid to solid form, and back again, very easily.
• B)Agar is a complete source of nutrients for most bacteria.
• C)Bacteria growing on the solidified medium did not degrade or break down the agar.
• D)Agar was less expensive than the nutrients that Koch was previously using in the lab.

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Definitions:

Return On Total Assets

A financial ratio that measures the efficiency of a company's assets in generating profit, calculated by dividing net income by total assets.

Earnings Per Share

A financial metric that measures the profitability of a company on a per-share basis, calculated by dividing the company's net income by its total number of outstanding shares.

Return On Total Assets

A financial ratio that measures a company's profitability relative to its total assets.

Inventory Turnover

A ratio showing how many times a company's inventory is sold and replaced over a period.