Gracilaria vermiculophylla: isomorphic biphasic life cycle
key terms
carpospore – a non-motile, diploid (2n) spore of red produced by the carposporophyte; carpospores develop into tetrasporophytes
carpogonium (-a): structure on a female gametophyte that produces gametes carposporangium (-a): the cell in a carposporophyte that produces carpospores. carposporophyte: formed by the union of haploid gametes; diploid (2n) stage of the life cycle that is carried by the haploid female gametophyte in the cystocarp; produces carpospores cystocarp: structure produced on female plant after fertilization, houses the carposporophyte fertilization: the fusion of gametes and their nuclei to form a zygote gametes: a cell that fuses with another cell during fertilization in organisms that sexually reproduce gametophyte: haploid plant that develops from a spore, produces gametes |
meiosis: nuclear division that changes diploid (2n) number of chromosomes to haploid (n) number of chromosomes
mitosis: the cell cycle process by which chromosomes in a cell nucleus are divided into two identical sets of chromosomes, each in its own nucleus spermatia: nonmotile male gametes spermatangium (-a): structure on a male gametophyte that produce spermatia (male gametes) tetrasporophyte: free-living, diploid stage of the life cycle that produces tetraspores by meiosis tetrasporangium (-a): a spore generating structure in the tetrasporophyte phase of the life cycle that produces four haploid spores tetraspore: one of four haploid spores produced by meiosis in a tetrasporangium that develops into a gametophyte |