Spore-1N-release from plant and goes to appropriate environment to grow. 1/2 will grow into anteridium (male), other 1/2 grow into arcegonium(female) (all 1N structures). Will produce 1N sperm and eggs. Gamedaphytes (structure producing gammetes) are produced, sperm swims to warer to an egg, and a 2N zygote is formed. 2N structure grows (mitosis) and the infant plant will grow on top of archigohium, producing spores through meiosis (sporelike generation).
Alternation of generation- altering from sporefite (protects species during hard times. Produce asexually so you do not get much variation) to medophite body of plant is 2N. Product is in spore. Spore grows to gamedophyte stage. Spore produces 1N (haploid) body or plant. Gamedophyte makes gammet (sex cell). When 2 sex cells fertilize a new sporophyte body is produced.
In all plants perdominant stage is sporefyte. In Bryophyte, it is gametophyte.
~monocotyledonous- monocots (single seed leaf) ie: corn.
~dicotyledonous-dicot (double seed leaf)- part of the seed that holds energy for plant growth.
~gravatropic- root grows down, plant grows up (responding to gravity).
~cotyledon=seed leaf
~Root of a monocot is called fibrous (grows every which way).
~Dicots have top root system (principle roots tap, drive into soil).
~Monocot leaf has parallel veins. Dicot leaves have net veins ( main vein, with others coming off sides).
~Monocot has vascular bundles, random, Dicot = arranged.
~Flowering parts in monocots are multiples of three. Flowering parts in dicots are multiples of four and five.
~petal=coroloa (all together)
~sepal=calyx (all together)
~entire female part of flower=carpel/pistol
~pollin- encased in shell
~sperm- flagellates (need aquatic area)
~anther- produces pollin
Entire carpel structure- long, thin, tube like structure. Color is a light green.
No comments:
Post a Comment