Plant reproduction is characterized by a type of life cycle called________?
Alteration of generations
The multicellular diploid stage in the life cycle of a plant; produces haploid, asexual spores through meiosis.
The haploid spores develop into multicellular, haploid bodies called________
Haploid spores produced....
Haploid gametes produced...
Zygotes are formed by....
The fusion of two haploid gametes.
_________- anchor and get water and nutrients; all land plants.
______limits water loss.
_____exchanges gas and limits water loss; all land plants.
_______transports water and minerasl in the plant; vascular plants.
________increases rigidity, thereby increasing sun exposure; vascular plants.
________- disperses male gametes without water; gymnosperms and angiosperms.
_____ protects and feeds the plant embryo; gymnosperms and angiosperms.
What is the Evolutionary Origin of Plants?
-Green algae gave rise to plants.
-the ancestors of plants lived in fresh water.
Bryophytes lacks what conducting structure?
- vascular tissue and lignin
- Reproductive structures
_____ grow in moist, shaded areas, and the sperm must swim up the stalks through a film of water to fertilize the eggs.
_______ have stalks that carry spore-bearing capsules.
Why are all bryophytes short?
Their size is limited due to the lack of vascular tissue and lignin.
Bryophytes leafy green gametophyte is the ______ generation that produces sperm and eggs.
Moss plants. the short, leafy green plants are ________ gametophytes; the reedish brown stalks are _________ sporophytes.
What are the major groups of plants?
- Vascular plants
_______ have conducting vessels that also provide support.
-Lignin adds extra support, so plants grow taller then nonvascular plants.
-Sporophyte stage is larger and more conspicuous than the gametophyte.
Seedless Vascular Plants include....
- Club Mosses
_____ stiffening substance, which is a rigid polymer that impregnates the conducting cells and supports the plant body, helping the plant expose maximum surface area to sunlight.
_______ produce swimming sperm, so water is essential for reproduction and are found in moist woodland habitats.
Seedless Vascular Plants
_____are the most diverse seedless vascular plants.
-Broad leaves unlike other seedless vascular plants. -Sporangia produce spores on special leaves
Seedless vascular plants that grows in temperate forests, and is sometimes called ground pines.
Seedless vascular plant that extends long, narrow branches in a series of rosettes, and its leaves are insignificant scales
The Seed Plants dominate land aided by two important adaptions: _______ and _______.
_____transports the sperm without water, and can be dispersed by wind or animals
_____ protects embryo and maintains dormancy.
Non-flowering seed plants are______.
The _________ (Gymnosperm) is the sporophyte generation and bears both male and female cones.
A member of a group of nonflowering vascular plants whose members reproduce by means of seeds formed inside cones; retains its leaves throughout the year.
_____attract pollinators, develop on the dominant sporophyte plant, and produce male and female gametophytes.
Male gametophytes (pollen grains) are produced within ______.
_______develops from a spore within the ovule, and contains one egg cell.
_________ transport sperm from the flower stigma to the egg in the ovary.
Plant embryo enclose in a _______ formed from the ovule.
____ is the smallest angiosperm found floating on ponds.
-About 1/8 inch (3 millimeters) in diameter.
The largest angiosperms are __________, which can reach 325 feet (100 meters) in height.
- Eucalyptus trees
The dominant plant body is the __________, whose flowers normally produce both male and female gametophytes.