In the 1940s, the Population of Whooping Cranes in North

question 47

Multiple Choice

In the 1940s, the population of whooping cranes in North America neared extinction, with fewer than 30 birds. It has since expanded to several hundred birds today. It is likely that these birds will exhibit very little genetic diversity. This is an example of

• A) biogeographical distribution
• B) the bottleneck effect
• C) random mutation
• D) the founder effect
• E) immigration

Understand the impact of certain lifestyle choices on cancer prevention and management.

Differentiate between malignant and nonmalignant growths.

Comprehend the trends in cancer incidence and death rates over the past decades.

Evaluate the role of industrial pollution and second-hand smoke in cancer development.

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Definitions:

Copper Rotor

A copper rotor is a component of an electric motor, where copper is used in the rotor windings due to its high electrical conductivity, improving motor efficiency.

Permanent Magnet Motors

Electric motors that use permanent magnets rather than electromagnets to generate the magnetic field required for rotation.

Lightweight Rotors

Rotors designed to reduce the overall mass, enhancing the mechanical efficiency and response of a system.

Ceiling Fans

Mechanical devices mounted on the ceiling of a room, designed to circulate air to cool or ventilate the space.