A Student Encounters a Pondweed Which, Judging from Its Appearance

question 20

Multiple Choice

A student encounters a pondweed which, judging from its appearance, seems to be a charophyte. She brings a sample back to her biology lab. Using only a compound light microscope to study the sample, which of the following features should help her to determine whether the sample comes from a charophyte or from some other type of green alga?
1) molecular structure of enzymes inside peroxisomes
2) structure of sperm cells
3) presence of phragmoplasts
4) rings of cellulose-synthesizing complexes

• A) 1 and 3
• B) 1 and 4
• C) 2 and 3
• D) 1, 3, and 4
• E) 2, 3, and 4

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Definitions:

Night Terrors

A sleep disorder causing feelings of terror or dread, typically occurring in the non-REM sleep phases, often accompanied by screaming or flailing and with little to no recollection of the dream content upon waking.

Nightmares

Distressing dreams that wake the sleeper, often involving feelings of fear, anxiety, or sorrow.

Uncontrollable Sleepiness

Excessive drowsiness that cannot easily be controlled or resisted, often indicative of underlying sleep disorders.

Narcolepsy

A chronic sleep disorder characterized by overwhelming daytime drowsiness and sudden attacks of sleep, often with cataplexy.