Useful+Vocabulary-1 - 1 PB40 Vocabulary Key* * (given in...

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1 PB40 Vocabulary Key* * (given in approximately the same order as the lectures) node = region on stem of plant to which a leaf is attached internode = region between two leaves vascular = pertaining to the transmission of fluids monocotyledon = one of the two great classes of angiosperms (flowering plants) distinguished by their embryos having only one cotyledon cotyledon = first leaf of plant contained in the embryo in the seed dicotylen = one of the two great classes of angiosperms (flowering plants) distinguished by their embryos having two cotyledons differentiation = a developmental process by which a relatively unspecialized cell undergoes progressive change to a more specialized cell or group of cells totipotent = unresticted developmental potential of a single nonreproductive plant cell to develop into an entire mature plant phenotype (trait) = physical appearance of an organism dependent on genotype and environment gametophyte = haploid gamete producing phase of plant life cyle gamete = haploid reproductive cell meristem = undifferentiated plant tissue from which new cells and organs arise genotype = genetic constitution gene = initially an abstract concept describing a unit of inherited information. Now defines a segment of DNA (or RNA) that encodes a unit of inherited information inheritance = that which is passed from one generation to the next organism = an individual living creature, unicellular or multicellular cell = the structural unit of an organism tissue = a group of like cells plasma membrane = fatty layer bounding the cell
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2 cytoplasm = watery sap inside cell that holds the cellular organelles organelle = specialized structure within the cell mitochondria = produce energy for reactions in the cell and organism endoplasmic reticulum = membranous network within the cytoplasm golgi = membrane sacs that transport molecules within and to the outside of cell proteins = complex organic compound composed of amino acid subunits cytoskeleton = flexible network of fibers within cells that give them shape nucleus = organelle within cell that contains genetic material nucleolus = site of r-gene localization and expression r-gene = ribosomal gene ribosomes = site of protein synthesis, composed of RNA and protein chromatin = complex of DNA and protein that represents uncondensed chromosomes eukaryotic = cell that has a membrane bound nucleus and membrane bound organelles and genetic material contained in chromosomes (DNA plus protein) prokaryotic = cell lacking a membrane bound nucleus and membrane bound organelles, and chromosomes nuclear pore = channel for molecules to transit between nucleus and cytoplasm chloroplast = take energy from sunlight and convert it into chemical energy vacuole = empty looking sac in plant cell cell wall = rigid outermost layer of plant cell somatic = of the body (versus germ = reproductive) mitosis = process whereby duplicatefd chromosomes divide longitudinally during cell division diploid = cells containing homologous pairs of chromosomes
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Useful+Vocabulary-1 - 1 PB40 Vocabulary Key* * (given in...

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