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 distinguishes them from most other gymnosperms?
1) They have exposed ovules.
2) They have flagellated sperm.
3) They are pollinated by animals.
A) 1 only
B) 2 only
C) 3 only
D) 2 and 3 only
E) 1,2,and 3
Correct Answer:
Verified
Q60: The next few questions are based on
Q65: In onions (Allium), cells of the sporophyte
Q67: When adult amphibian skin harbors populations of
Q70: The next few questions refer to the
Q72: If infection primarily involves the outermost layers
Q103: A dissection of the interior of this
Q106: The harpy eagle,Harpia harpyja,is the largest,most powerful
Q108: Please use the following information to answer
Q110: Please use the following information to answer
Q112: Please use the following information to answer
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents