Biology

(biology) growth by addition as by the adhesion of parts or particles

(biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production o…

(botany) the arrangement of sepals and petals in a flower bud before it opens

(biology) state of relationship between organisms or groups of organisms resulting in resemblance in structure or structural parts; "in anatomic…

(genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that contro…

(genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that contro…

(genetics) an organism or cell having a diploid set of chromosomes from each parent

(biology) reproduction by the union or fusion of two differing gametes (especially differing in size)

(botany) a plant that completes its entire life cycle within the space of a year

(botany) development of an embryo without fertilization; especially the development in some ferns of a sporophyte from the gametophyte without f…

(botany) a natural swelling or enlargement: at the base of the stalk or seta in certain mosses or on the cone scale of certain conifers

(biology) growth in the thickness of a cell wall by the deposit of successive layers of material

(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important…

(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important…

(botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed; consists primarily of sieve tubes

(botany) a plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom an…

(biology) a scientist who studies living organisms

(botany) a swelling on a plant similar to that on the skin

(biology) a branching or armlike part of an animal

(biology) the process of decay caused by bacterial or fungal action

(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid

(botany) the whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the de…

(genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can…

(biology) degenerative reversion of cells or tissue to a less differentiated or more primitive form

(biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colo…

(biology) the theory that cells form the fundamental structural and functional units of all living organisms; proposed in 1838 by Matthias Schle…

(biology) the theory that cells form the fundamental structural and functional units of all living organisms; proposed in 1838 by Matthias Schle…

(genetics) an attribute (structural or functional) that is determined by a gene or group of genes

(genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism

(genetics) the process of locating genes on a chromosome

(genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as…

(biology) a taxonomic group containing one or more orders

(biology) a narrowing or constriction of a vessel or canal; especially a congenital narrowing of the aorta

(botany) the process in some plants of parts growing together that are usually separate (such as petals)

(microbiology) a group of organisms grown from a single parent cell

(botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)

(botany) outer tissue of bark; a protective layer of dead cells

(botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth; "we cultivate the flower for…

(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower

(genetics) a large vector that is made from a bacteriophage and used to clone genes or gene fragments

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

(genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or ani…

(genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or ani…

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

(biology) the growing of microorganisms in a nutrient medium (such as gelatin or agar); "the culture of cells in a Petri dish"

(biology) the field of science concerned with processes of communication and control (especially the comparison of these processes in biological…

(biology) the process of decay caused by bacterial or fungal action

(biology) release of material by splitting open of an organ or tissue; the natural bursting open at maturity of a fruit or other reproductive bo…

(genetics) the loss or absence of one or more nucleotides from a chromosome

(neuroscience) of or relating to or resembling a dendrite; "dendritic fiber"

(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gr…

(biology) the structural adaptation of some body part for a particular function; "cell differentiation in the developing embryo"

(biology) the existence of two forms of individual within the same animal species (independent of sex differences)

(genetics) an organism or cell having the normal amount of DNA per cell; i.e., two sets of chromosomes or twice the haploid number

(botany) taxonomic unit of plants corresponding to a phylum

(biology) a group of organisms forming a subdivision of a larger category

(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

(botany) a minute rudimentary plant contained within a seed or an archegonium

(botany) the arrangement of sepals and petals in a flower bud before it opens

(botany) the act of causing a plant to develop without chlorophyll by growing it without exposure to sunlight; "the etiolation of celery"

(biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms

(biology) a scientific theory of the origin of species of plants and animals

(genetics) the process of expressing a gene

(genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as…

(biology) a taxonomic group containing one or more genera; "sharks belong to the fish family"

(genetics) the diploid cell resulting from the union of a haploid spermatozoon and ovum (including the organism that develops from that cell)

(botany) a living organism lacking the power of locomotion

(botany) the process of forming leaves

(biology) a group of organisms within a species that differ in trivial ways from similar groups; "a new strain of microorganisms"

(biology) an artificial taxonomic category for organisms of which the true relationships are obscure; ranked between order and genus

(biology) an artificial taxonomic category for organisms of which the true relationships are obscure; forms the first half of a species' unique…

(genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as…

(genetics) traits that tend to be inherited together as a consequence of an association between their genes; all of the genes of a given chromos…

(genetics) a mutation due to an intramolecular reorganization of a gene

(genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism

(biology) taxonomic group containing one or more species

(botany) a slender tubular outgrowth from a spore in germination

(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gr…

(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gr…

(botany) a plant product that acts like a hormone

(genetics) an organism or cell having only one complete set of chromosomes

(genetics) a combination of alleles (for different genes) that are located closely together on the same chromosome and that tend to be inherited…

(genetics) attributes acquired via biological heredity from the parents

(biology) the lack of correspondence of apparently similar body parts

(genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species

(genetics) the tendency of a crossbred organism to have qualities superior to those of either parent

(genetics) an organism having two different alleles of a particular gene and so giving rise to varying offspring

(biology) similarity because of common evolution

(botany) having styles all of the same length

(botany) having styles all of the same length

(botany) having styles all of the same length

(genetics) an organism having two identical alleles of a particular gene and so breeding true for the particular characteristic

(genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or ani…

(genetics) the tendency of a crossbred organism to have qualities superior to those of either parent

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

(genetics) attributes acquired via biological heredity from the parents

(genetics) a mutation caused by the insertion of exogenous DNA into a genome

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

(biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall

(genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed

(biology) reproduction by the union or fusion of gametes of the same size and structure

(biology) similarity or identity of form or shape or structure

(biology) similarity or identity of form or shape or structure

(botany) the small swelling that is the part of a plant stem from which one or more leaves emerge

(botany) the process of forming leaves

(biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

(biology) a scientist who studies living organisms

(botany) any appendage to a plant that is shaped like a strap

(genetics) traits that tend to be inherited together as a consequence of an association between their genes; all of the genes of a given chromos…

(botany) either of the two parts of a bilabiate corolla or calyx

(botany) a part into which a leaf is divided

(botany) pollination of plants by snails.; "Malacophily is among the rarest instances of pollination."

(genetics) the process of locating genes on a chromosome

(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gr…

(biology) a substance in which specimens are preserved or displayed

(genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containin…

(genetics) one of two principles of heredity formulated by Gregor Mendel on the basis of his experiments with plants; the principles were limite…