Jacob Is Studying a Population of Wrens in Michigan

question 1

Multiple Choice

Jacob is studying a population of wrens in Michigan. Over several years, he notices that the population always stabilizes at around 45 individuals. Which of the following is a possible explanation for Jacob's observation?

• A) population is at maximum density
• B) death rate is higher than birthrate
• C) exponential growth
• D) limited resources to support additional birds
• E) slow lag phase

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Definitions:

Murmur

A sound heard during heartbeat cycles, often indicative of a heart disorder but sometimes found in healthy hearts.

Lubb (S1)

The first heart sound in the cardiac cycle, associated with closure of the mitral and tricuspid valves at the beginning of ventricular contraction.

Dupp (S2)

A term referring to the duplication of the second heart sound, often associated with physiological or pathological cardiac conditions.

Pulmonary Trunk

The major blood vessel that carries deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.