Do different flowers have the same number of petals, sepals and stamens? Why or why not?

Answer 1

Yes, they do.

A petal is one of the often brightly colored parts of a flower immediately surrounding the reproductive organs; a division of the corolla. A sepal is one of the separate, usually green parts forming the calyx of a flower. A stamen is the pollen-producing reproductive organ of a flower, usually consisting of a filament and an anther.

Of course this assumes you already know what a calyx, corolla, filament and anther are. If not, just go to my link, click on dictionary and type it in. I imagine flowers have different numbers of petals based on how efficient those petals are at bringing in pollinators such as bees. If more petals brings more bees it will have more, if less does the job it will have less. Plants basically adapt to their environment.

Here we go I found this drawing of plant anatomy.

http://www.enchantedlearning.com/subjects/plants/printouts/floweranatomy.shtml

Answer 2

Monocotoledinous.... I can't spell that...: Mono cots and Di cots do have an "assigned number". One has leaves, petals sepals, stamens in threes - or multiples of threes. The other is in 5's. My immediate problem is that I'm unsure as to whether it is mono-cots or di-cots which drew the "3". 'Believe the answer to the first part of your question is "yes". As to "Why?": It's the same reason that roots are negatively phototropic, stems are positivily phototropic.... It's how it all evolved.