A Salamander Is a Vertebrate That Spends Part of Its

question 3

Multiple Choice

A salamander is a vertebrate that spends part of its life cycle in water (juvenile stage) and part on land (adult stage) . In both life stages, the salamander's body temperature depends on its surrounding environment, so the salamander demonstrates ________ behavior.

• A) endothermic
• B) ectothermic
• C) huddling
• D) regulatory

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Definitions:

Sliding Fifth Wheel

A fifth wheel mounted on toothed rails, permitting forward and rearward movement; this directly affects weight over the tractor axles by altering the bridge formula and the overall length of a tractor/trailer combination.

Comfortable Ride

A driving experience where the vehicle smoothly navigates terrain with minimal jarring or discomfort to the passengers.

Bogie Centerline

The central line running through a bogie, which is a framework carrying wheels, attached to vehicles such as trains or trailers, aiding in stability and balance.

Bridge Formula

Used to determine how a truck and semi-trailer support their respective loads. Generally, if a trailer sliding bogie is moved forward, the percentage of load supported by the tractor decreases. Bridge formula is also used to determine how tractor axles are loaded when the fifth wheel position is altered. Moving a sliding fifth wheel forward takes load off the drive bogies and transfers it to the steer axle.