Examlex
The next few questions refer to the following description.
The cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the Age of the Dinosaurs. Though their sperm are flagellated, their ovules are pollinated by beetles. These beetles get nutrition (they eat pollen) and shelter from the microsporophylls. Upon visiting megasporophylls, the beetles transfer pollen to the exposed ovules. In cycads, pollen cones and seed cones are borne on different plants. Cycads synthesize neurotoxins, especially in the seeds, that are effective against most animals, including humans.
-Which feature of cycads makes them similar to many angiosperms?
1) They have exposed ovules.
2) They have flagellated sperm.
3) They are pollinated by animals.
Calibrated
Adjusted precisely for a particular function.
Green stopper
Refers primarily to the color-coded stopper found on certain medical or laboratory vials, often indicating specific chemical additives or uses.
Collection tube
A tube used in medical settings for the collection of bodily fluids or gases for diagnostic testing.
Electrolyte studies
Tests that measure the levels of key electrolytes in the body such as sodium, potassium, and chloride, which are critical for maintaining proper body function.
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