Which structure produces the megaspore in gymnosperms?

For a patient who is suspected of having a stroke, the most important piece of information that the nurse would obtain is    

All vascular plants have ______. 

The plant group with true vascular tissue, silica in the epidermis, whorled leaves and branches, but does not produce seeds is called ________.

Ocean in the climate system: Why is the ocean a dominant factor in the Earth’s climate system?  Give 4 global-scale reasons.  For each one, explain how the ocean affects climate. 

For a patient who is suspected of having a stroke, the most important piece of information that the nurse would obtain is    

In Isoetes, which has a heterosporus life cycle, archegonia are produced by _____________.

A flower may have ____ pistil(s) and ____ carpel(s). 

Wave refraction is caused by ____.

Coastal New England and northeastern Canada are sometimes hit by hurricanes primarily because ____.