Which of the Following Poses the Best Evidence That Cell-Signaling

question 84

Multiple Choice

Which of the following poses the best evidence that cell-signaling pathways evolved early in the history of life?

• A)Cell-signaling pathways are seen in "primitive" cells such as bacteria and yeast.
• B)Bacteria and yeast cells may undertake quorum sensing.
• C)Signal transduction molecules identified in distantly related organisms are similar.
• D)Most signals in all types of cells are received by cell surface receptors.
• E)Signals in bacteria are hydrophobic and do not require a cell surface receptor.

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Definitions:

Recognition Lag

The time needed to identify a macroeconomic problem and assess its seriousness.

Effectiveness Lag

The time it takes for a policy action, particularly in monetary or fiscal policy, to produce its intended effects on the economy.

Recognition Lag

The time it takes for policymakers to identify and acknowledge an economic problem or trend.

Economic Policy

A set of strategies chosen by a government to influence its economy, including fiscal policy (use of government spending and taxation) and monetary policy (controlling the nation's money supply and interest rates).