A gametophyte is a haploid multicelled body in which haploid gametes form during the life cycle of plants and some algae.
Monday, September 14, 2009
Spore
A strucutre of one or feew ells, often walled or coated, that protects and/or dispersea new sexual or asexual generation. Many bacteria as well as apicomplexans, fungi, and plants form spores.
Commensalism
An ecological interaction in which one species benefits directly and on or more others are affected little, if at all.
Rhizome
Rhizome is a characteristically horizontal stemof a plant that is usually found underground, often sending out roots and shoots from its nodes.
Sporopphyte
A multicellular sporophyte generation or phase is present in the life cycle of all land plants.
Parasitism
Parasitism is a type of symbiotic relationship between organisms of different species where one organism, the parasite, benefits at the expense of the host.
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Eubacteria
Eubacteria are prkaryotic, meaning their cells do not have defined, membrane-limited nuclei. Eubacteria is better know for only bacteria.
Homeostasis
Homeostasis is in the state in which pysical and chemiacl aspects of internal enviromenta are being maintained within ranges that are tolerable for cell activities.
Asexual Reproduction
Asexual reproduction is reproduction which does not involvemeiosis,ploidy reduction, or fertilization.Enzyme
Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative reaction pathway of lower activation energy.http://www.rsc.org/education/teachers/learnnet/cfb/enzymes.htm
http://www.nature.com/nature/journal/v443/n7113/images/nature05210-f1.2.jpg
Glycogen
Glycogen is the molecule that functions as the secondary short-term energy storage in animal cells.
Flower Ovary
In the flowering plants , an ovary is a part of the female reproductive organ of the flower or gyneoeciumg.
http://web.gccaz.edu/~lsola/Flower/lilycut.jpg
http://en.wikipedia.org/wiki/Ovary_(plants)http://web.gccaz.edu/~lsola/Flower/lilycut.jpg
Endosperm
The tissue that surrounds and provides nourishment to the embryo in the seeds of many angiosperms. The cells of the endosperm arise from a process similar to that of fertilization. The pollen of angiosperms contains two sperm, one of which fertilizes the egg cell in the female gametophyte. The second unites with two other nuclei in the female gametophyte, producing cells that are triploid (having three sets of chromosomes) and that develop into the endosperm. In some species of angiosperms, the endosperm is absorbed by the embryo before germination, while in others it is consumed during germination. Embyros that lack an endosperm (such as peas and beans) have absorbed most of their food storage tissues before becoming dormant and develop large, fleshy cotyledons.
http://www.thefreedictionary.com/endosperm
http://www.virtualherbarium.org/images/AdonidiaSeed1.jpg
Archeabacteria
Phloem
In vascular plants , phloem is the living tissue that carries organic nutrients (known as photosynthate), particularly sucrose, a sugar, to all parts of the plant where needed.
Calvin Cycle
The Calvin cycle (or Calvin-Benson-Bassham cycle, light-independent reaction, or carbon fixation) is a series of biochemical reactions that take place in the stroma of cholorplasts in photosynthetic organisms.
Krebs Cycle
A series of enzymatic reactions in aerobic organisms involving oxidative metabolism of acetyl units and producing high-energy phosphate compounds, which serve as the main source of cellular energy. Also called citric acid cycle, tricarboxylic acid cycle.
http://vincentimbe.files.wordpress.com/2007/11/krebs-cycle.jpg
http://vincentimbe.files.wordpress.com/2007/11/krebs-cycle.jpg
Gymnosperm Leaf
A gymnosperm leaf is a taxonomic class of the plant kingdom. The seeds of gymnosperms are borne naked with no ovary. Pines, spruces, and ginkgo are examples of gymnosperms. This picture shows more than a leaf. =]
Basidiomycete
A basidiomycetes is any of various fungi belonging to the phylum Basidomycota, bearing sexually produced spores on a basidium The basidiomycetes are the most familiar forms of fungi and include mushrooms, puffballs, shelf fungi, rusts, and smuts.
Modified Leaf of a Plant
A modified leave is a leave of a plant that is modified with spines or flowers. The spines surface reduces water loss and also may deter predators.
ATP
ATP is the energy stored that can be released at anytime.Plants get their energy from the sunlight, then they store it i cells where it cna be used when needed.
Gymnosperm Cone
Gymnosperm cone is a group of spermatophyte see-bearing plants with ovules on scales.
Ethylene
Ethylene is found in fruits in their ripening process, because it's a plant hormone which differs from other plant hormones in being a gas. Ethylene causes ripening and also affects many other plant functions such as seed germination, flower formation and drooping of leaves.
Redox Reaction
Redox reaction describes all chemical reactions in which atoms have their oxidation number or oxidation state changed.
Amnitoic Egg
An amniotic egg is an egg that protects the offspring of birds, reptiles and mammals.
The amniotc part relates to amnion:(a protective membrane) surrounds the embryo in a bag of (‘amniotic’) fluid. Evolutionarily, the amnion is primitively associated with a shell and is capable of gaseous exchange; its development thus enabled eggs to be laid on dry land for the first time in vertebrate evolution.
The amniotc part relates to amnion:(a protective membrane) surrounds the embryo in a bag of (‘amniotic’) fluid. Evolutionarily, the amnion is primitively associated with a shell and is capable of gaseous exchange; its development thus enabled eggs to be laid on dry land for the first time in vertebrate evolution.
Cambium
Cambium is a lateral meristem in vascular plants, including the vascular cambium and cork cambium, that forms parallel rows of cells resulting in secondary tissues.
Endotherm
An endotherm organism is an organism that generates heat to maintain its body temperature, typically above the temperature of its surrounding. Most mammals birds, some fishes and insects and even some plants are considered endotherm. This is a picture of a far away cat, due to my frightness of cats.
Heterotroph
Heterotrophs are known as consumers in food chains and obtain organic carbon by eating other heterotrophs or autotrophs. They break down complex organic compounds that are produced by autotrophs. All animals are heterotrophic.
Population
Population is the collection of inter-breedig organisms of a particular species or a human-being group.
Bilateral Symmetry
Bilateral symmetry in biology is the balanced distribution of duplicate body parts or shapes.
Prokaryotes
Prokaryotes are a group of organism that lack a cell nucleus or any other membrane-bound organelles. Prokaryotes are divided into two doamis: bateria and archea.
Sunday, September 13, 2009
Territorial Behavior
The term territory refers to any area that an animal consistently defends against other animals. Animals that defend territories in this way are referred to as territorial.
Mutalism
Mutalism is an association between organisms of two different species in which each member benefits. In this picture the bee as well as the flower gain a benefit.
A pollinator is an agent that transfers pollen from one flower to another, accidentally or intentionally. Bees, butterflies, moths, other insects, hummingbirds, and humans all serve as pollinators( Mrs.V this is a picture I took in Greece didn't know about this so I never put an object to prove it was my. )
Pollen
Pollen is the the fine powderlike material consisting of pollen grains that is produced by the anthers of seed plants. Mostly known as the "yellow thing" in the middle of a flower.
Genetic Variation within a Specie
Genetic variation refers to the total number of genetic characteristics in the genetic makeup of a species.
Saturday, September 12, 2009
Exoskeleton
Exoskeletons contain rigid and resistant components that fulfill a set of functional roles including protection, excretion, sensing, support, and feeding.
Eukaryote
Eukaryote is an organism whose cells contain a nucleus. Almost all species of large organisms are eukaryotes, including, animals, and plants.
Epithelial Tissue
Hey you're epithelial tissue is showing! An epithelial tissue is made up of cells closely packed and ranged in one or more layers. This tissue is specialised to form the covering or lining of all internal and external body surfaces.
ECTOTHERM
An ectotherm is an organism that control body temperature through external means. As a result, organism are dependent on enviromental heat sources. Ectotherm organism are commalny known as poikilotherm.
Cuticle Layer of a Plant
A cuticle is any variety of tough but flexible, non-mineral outer coverings of an organism, or parts of an organism, that provide protection. A cuticle layer of a plant is the waxy layer of that plant.
Autotroph
An autotroph is an organism that produces complex organic compounds from simple inorganic molecules using energy from light . A tree is an autotroph because it gets its energy from the sunlight.
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