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question 103

Multiple Choice

Please use the following information to answer the questions below.
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 microsporophylls (leaflike structures that contain microsporangia) .Upon visiting megasporophylls (leaflike structures where megaspores are formed) ,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.


Definitions:

Exacerbation

A worsening or increase in the severity of symptoms or disease.

Bronchovesicular Breath Sounds

Normal breath sounds heard over the main bronchus area and over the upper right posterior lung field, characterized by moderate pitch and intensity.

Pathologic Disease

A disease characterized by an identifiable set of signs or symptoms, often associated with disordered bodily function.

Major Airways

The primary passages in the respiratory system, including the trachea and bronchi, that facilitate the flow of air to and from the lungs.

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