What Is Wood

question 55

Multiple Choice

What is wood?  

• A) Secondary xylem that has accumulated outside a cylinder of vascular cambium
• B) Secondary xylem that has accumulated inside a cylinder of vascular cambium
• C) Primary xylem that has accumulated outside a cylinder of vascular cambium
• D) Primary xylem that has accumulated inside a cylinder of vascular cambium
• E) Vascular cambium cells

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Definitions:

Deepest Stage

Refers to the phase of sleep (specifically, stage 3 or 4 of non-REM sleep) characterized by the deepest level of unconsciousness and the hardest state from which to be awakened.

REM Rebound

The phenomenon of increased REM sleep after a period of REM sleep deprivation.

NREM Rebound

The increase in the amount of non-rapid eye movement (NREM) sleep after being deprived of sleep, as a compensatory response.

Sleep Apnea

A sleep disorder characterized by pauses in breathing or shallow breaths during sleep, leading to poor sleep quality and other health issues.