- published: 24 Jun 2014
- views: 4224166
In biology, a spore is a reproductive structure, some of which are adapted for dispersal and surviving for extended periods of time in unfavorable conditions. The spores of seed plants, however, are produced internally, and it is larger structures derived from the spores that disperse (the megaspores are formed within the ovules, and the microspores later give rise to pollen grains).
Spores form part of the life cycles of many bacteria, plants, algae, fungi and some protozoa. According to scientist Dr. Steinn Sigurdsson, "There are viable bacterial spores that have been found that are 40 million years old on Earth - and we know they're very hardened to radiation."
Spores are usually haploid and unicellular and are produced by meiosis in the sporangium of the sporophyte. Once conditions are favorable, the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes. Two gametes fuse to create a new sporophyte. This cycle is known as alternation of generations.
You left your black gloves on my table
You left your dying horse in the stable
Thinking of a way to get you to stay
And up I was to fight the wind and waves for you
I?m an owl with giant eyes
I?m the scarecrow in the skies
The ultimate goal out facing the north
I wanted to stay inside and look down below with you
You never said then when I was in your arms
That was the moment that you lost your charm
[Incomprehensible]
And the trees, they never grew any leaves
Shake my arms, shake my head
I fell asleep when you got well
And I?m turning for the lights tonight