Bilateral Symmetry- an organism which is divisible into symmetrical halves in one plane only. An organism with bilateral symmetry is a dog.
Connective Tissue- tissue that connects, supports, binds or separates other tissue or organs. The connective tissue in a human is inner layers of skin, tendons, ligaments, cartilage, bone and fat tissue.
Dominant Phenotype- the phenotype of a genotype containing the dominant allele, which is the parental phenotype that is expressed in a heterozygote. I have a double jointed thumb, which is a dominant phenotype.
Fermentation is the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms. Fermentation is the process used to make beer, wine, and liquor.
Flower Ovary- in flowering plants, an ovary is part of the female reproductive organ of the flower. A fruit (for example, a grape) is the ripened ovary from a flower.
An enzyme is a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction. An example of an enzyme is Lactase, which is essential for the digestion of milk. My brother can digest milk because his body produces the enzyme Lactase.
Endotherm- an animal that can generate internal heat. A cat is an example of an endotherm because cats are warm blooded.
Vestigial Structure- homologous structures of organisms that have lost all or most of their original function through evolution. An example of a vestigial structure is the human appendix. This is me pointing to my useless appendix.
Prokaryote- a microscopic single-celled organism, including the bacteria and cyanobacteria, that has neither a distinct nucleus with a membrane nor other specialized organelles. An example of a prokaryote is Salmonella, which can be found in raw eggs.
Tropism- the turning of all or part of an organism in response to an external stimulus. The orchid's flowers grow towards the sunlight that comes in through the window.
ATP (Adenosine Triphosphate)- a nucleotide derived from adenosine that occurs in muscle tissue; the major source of energy for cellular reactions. Here are my brother's "muscles".
Parasitism- the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it. This vine with leaves on it is growing into and around this tree.
Pollen- a fine powdery substance, typically yellow, consisting of microscopic grains discharged from the male part of a flower. There is pollen in the center of this flower.
Cuticle Layer of a Plant- a continuous layer of waxy substances covering over the outer surfaces if the epidermis of plants containing cutin and protects against water loss/gain.
Lichen- a simple slow-growing plant tissue that typically forms a low crust-like, leaf-like, or branching growth on rocks, walls, trees, and in grass. Here is moss, which is a type of lichen.
Population- a community of animals, plants or humans. There is a large population of rhododendrons in my backyard.
Frond- refers to a large, divided leaf. An example of a frond is a fern leaf.
Spore- a haploid reproductive cell that gives ride to a gametophyte. Ferns are a spore producing plant.
Meristem- a region of plant tissue, found chiefly at the growing tips of roots and shoots and in the cambium, consisting of actively dividing cells forming new tissue. Here are the root tips where the meristem would be.
Phloem- the vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves. The phloem in this tree would transport the sugars and metabolic products to the roots.
Unicellular Organism- consists of only one cell. An example of a unicellular organism is bacteria, which is found virtually anywhere, outside or inside.
Xylem- the vascular tissue in plants that conducts water and dissolved nutrients upward from the roots. Here is a plant where the xylem would transport nutrients up into the leaves.
Endosperm- the part of a seed that acts as a food store for the developing plant embryo, usually containing starch with protein and other nutrients. An example of an endosperm is corn.
Epithelial Tissue- membranous tissue covering internal organs and other internal surfaces of the body. There is epithelial tissue covering the organs inside of my dog's abdomen.