Konstantin Mereschkowski proposed a symbiotic origin for cells with nuclei.
An organism studied as representative, either with respect to the course of some disease that also occurs in humans, or with respect to the general category of organisms to which the organism belongs. Biology Dictionary MOL- molar n. One of the grinding teeth at the rear of the jaw.
The number of moles of solute in a liter of solution.
The grams containing Avogadro's number of molecules of a substance; a mole of a substance has the same weight in grams as its molecular weight measured in daltons. The study of the formation, structure, and function of macromolecules found in living organisms, particularly nucleic acids and proteins.
The development of transgenic animals to produce human proteins. The study, at the molecular level, of the function and structure of genes.
A very diverse phylumincluding such animals as gastropodsbivalvesoctopuses, squidscuttlefishesand the chambered nautilus at right. The mollusks have marine, freshwater, and terrestrial representatives. Animals in the phylum Mollusca. To cast off the outer covering. Birds molt old feathers once or twice a year.
Retiles molt old skin, and arthropods cast off the entire cuticle. Mammals also molt hair, but the term shed is usually used in this case. The casting off or shedding of an outer covering, usually to accommodate growth.
The condition of having a single anthers. An antibody obtained from a single clone of plasma cells. An angiosperm with one cotyledon. A type of leukocyte that functions in the immune system by migrating to tissues and then differentiating into macrophages and dendritic cells.
A disorder caused by mutation of a single gene. An atom or single molecule that can join with other, like atoms or molecules to form a polymer. Monosaccharides are unaffected by enzymes and are absorbed directly by the body without change.
Having one copy of a given chromosome instead of the two normally present in diploid cells. A member of the major division Monotremata egg-laying mammals of Class Mammalia, the other two being eutherian mammals and marsupials. Monotremata includes the platypus and the two echidnas.
Occurring in the mountains. A diagram showing the chromosomal location of genes associated with disease. A unit named for Thomas Hunt Morgan expressing the relative distance between loci on a chromosome. In humans, a centimorgan is approximately equivalent to a megabase.
The proportion of individuals that die in a specified period of time or under a particular condition.melanin /MEL-ə-nən, -nin/ n. A group of tyrosine-derived compounds found in rutadeltambor.comion in melanin genes has its most evident effect in color variation.
Eumelanin, which is brownish black, is the most common form. Protist, any member of a group of diverse eukaryotic, predominantly unicellular microscopic organisms.
They may share certain morphological and physiological characteristics with animals or plants or both. The term protist typically is used in reference to a eukaryote that is not a true animal, plant, or fungus or in reference to a eukaryote that lacks a multicellular stage.
Eukaryotic cells also contain other membrane-bound organelles such as mitochondria and the Golgi apparatus, and in addition, some cells of plants and algae contain chloroplasts. Unlike unicellular archaea and bacteria, eukaryotes may also be multicellular and include organisms consisting of many cell types forming different kinds of rutadeltambor.com: Eukaryota, (Chatton, ) Whittaker & Margulis, Organisms are placed into these categories based on similarities or common characteristics.
Some of the characteristics that are used to determine placement are cell type, nutrient acquisition, and reproduction. The two main cell types are prokaryotic and eukaryotic rutadeltambor.com types of nutrient acquisition include photosynthesis, absorption, and ingestion.
Eukaryote cells include a variety of membrane-bound structures, collectively referred to as the endomembrane system. Simple compartments, called vesicles and vacuoles, can form by budding off other rutadeltambor.com cells ingest food and other materials through a process of endocytosis, where the outer membrane invaginates and then pinches off to form a vesicle.
A multicellular organism is actually an aggregation of cells. Here a group of cells functions in a same way to form a tissue or an organ (Example: Xylem vessels, cork cells, cells in the skin). Multicellular organisms have a great capacity to survive than unicellular organisms.