Intro Terms Flashcards
Autotrophy
synthesis of high energy organic compounds from low energy inorganic compounds
Unicells
Single cells (motile or non-motile)
Colonies
assemblages of either variable number of cells or a constant number of cells
Filaments
Daughter cells remain attached after division
Unbranched or branched
Uniseriate (single series of cells) or multiseriate (fusion of filaments)
Coenocytic
Multinucleate cell with cross walls
Parenchytomous form
Three-dimensional thallus
Pseudoparenchytomous form
Superficially resemble parenchyma
Composed of aggregate filaments or amorphous aggregations of cells
Zoospores
flagellated cells
produced in vegetative cells or specialized cells
Contains components needed to form new individual
Aplanspore
Non-motile but have genetic capacity to develop flagella
Autospore
Non-motile with no ability to develop flagella
miniature versions of parents
Fragmentation
Controlled breaks in filaments of non-coenobic colonies
Each piece continues to grow
Autocolony
produce miniature versions of coenobia
Akinete
specialized resting cell (cyanobacteria)
Isogamy
Two identical gametes fuse (+ and -)
Anisogamy
Two different shape/size or behaviour gametes fuse
Oogamy
small motile or non-motile gamete (male) fuses with larger immobile gamete (female)
Monoecious
Same individual produces male and female gametes
Dioecious
Male and female gametes produced by different individuals
Homothallic
Gametes of genetically similar individuals fuse and produce viable offspring (self-fertile)
Heterothallic
Gametes of genetically different individuals needed for viable offspring (self-sterile)
Zygotic meiosis
meiosis takes place on zygote
only diploid cell is the zygote
vegetative state and gametes are haploid
Gametic meiosis
Meiosis produces haploid gametes
The diploid zygote undergoes mitotic divisions to produce diploid vegetative state
Sporic meiosis
Meiosis produces haploid spores
Haploid body: gametophyte
Haploid gametes produced by mitosis of gametophyte
Diploid zygote produces diploid sporophyte by mitosis
Isomorphic
gametophyte identical to sporophyte
Heteromorphic
gametophyte and sporophyte dissimilar
Haplobiontic
one type of free living stage
Diplobiontic
two stages of free living
Haplontic
single predominant haploid phase
Diplontic
single predominant diploid phase
Haplodiplontic
two phases haploid and diploid
