Biology ch.27 Crossword
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
 
 
Down: 1) Follows dispersal . takes place to form seedling. Doesn't take place until there is sufficient water , warmth and oxygen to sustain growth. Dormancy is required first. 2) the reproductive structure of angiosperms, produces two types of spores by meiosis , microspores and megaspores.3) has undergone mitosis to become the fermale gametophyte , an embryo sac located within an ovule found within an ovary.6) also called embryo sac.7) undergoes mitosis and becomes a pollen grain which is either windblown or carried by an animal to the vicinity of the female gametophyte.8) are flowers that have both male and female parts9) are colored to attract specific pollinators.10) When the pollen tube reaches the micropyle.13) embryogenesis, meristem tissue culture,anther tissue culture.14) slender stalk.15) a source of plant cells.18) plants generated from somatic embryos are not always genetically identical clones due to mutations or somaclonal varations. somatic embryos can be encapsulated in hydrated gel , creating artificial seefs that can be shipped anywhere.19) if pollen from the same plant is used to fertilize itself.20) horizontal stems that can be seen because they run above ground.Straw berries.22) hormones are added to the medium and they cause leaf or other tissue cells to generate small masses of cells which can be genetically engineered before being allowed to become new identical plants.24) as one species changes the other changes too, so that in the end the two species are suited to one another.25) a nutritive tissue that the developing embryoic sporophyte will use as an energy source.26) is at first an immature male gametophyte , that consists of a tube called the pollen tube and a generative cell.27) enlarged sticky knob.28) pollen from different plant is transferred to a new plant. Both plants are the same species though.Ex. Wind, insects, animals.33) slender stalk.34) the male portion of the flower .contains the anther and the filament.36) also called the female gametophyte consists of 7 cells : one egg , associated with 2 synergid cells; one central cell, two polar nuclei, and three antipodal cells.42) the most leaf like of all the flower parts , are usually green , and they protect the bud as the flower develops within .Collectively the sepals are called the calyx. Across: 4) have either male or female parts not both.5) underground stems that produce new plants asexually. Potatoes10) the time during which no growth occurs , even though conditions may be favorable for growth.11) another name for petals.12) Flowers that are missing either the sepal, petal, stamen , or carpels.16) a mature ovary and sometimes , in addition , other flower parts such as the receptacle.17) the simple transfer of pollen from an anther to the stigma of a carpel.21) allows scientists to extract chemicals from plant cells , which may have been genetically modified in high concentration and without having to over collect wild type plants growing in their natural environments.23) plants that produce microspores and megaspores. Microspores become mature male gametophytes. and megaspores become matre female gametophytes.29) 30) produces digitakusm digitoxin and digoxin which are useful in the treatment of heart disease.31) an enlarged based that encloses the ovules.32) the growth of a tissue in an artificial liquid or solid medium.35) a technique which the haploid cells within pollen grains are cultured in order to produce haploid plantlets.37) contains the embryo and stored food surrounded by a seed coat38) a vaselike structure that represents the female portion of the flower . Contains the stigma,ovary, and the style.39) also called embryo sac.40) genetic capability of becoming an entire plant.41) produces quinine which is used to treat leg cramping a major symptom of malaria.43) Awesome44) Flowers that have sepals, petals , stamen and carpels.45) saclike container 46) play a significant role in the production of megaspores or the female gametes.
 

 

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