alternation of generations

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meiosis

process by which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell

sporophyte

the spore-producing individual or phase in the life cycle of a plant having alternation of generations

secondary oocyte

..., A haploid cell resulting from the first meiotic division of oogenesi (not that the cytoplasmic division in this case is unequal, producing one large cell with almost all of they cytoplasm - the secondary oocyte- and one smaller cell with virtually no cytoplasm - the first polar body.). The secondary oocyte (along with some follicular cells) is released from the ovary during ovulation.

sequential hermaphroditism

..., An individual reverses its sex during its lifetime

zoospores

..., Flagellated spores

antheridia

..., Male gametangia

sperm

..., Male sex cell

internal fertilization

..., Process in which eggs are fertilized inside the female's body

karyogamy

..., The fusion of nuclei of two cells, as part of syngamy.

spore

..., a small usually single-celled reproductive body produced by many plants and some protozoans and that develops into a new individual

egg

..., animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes

spore mother cell

..., cell from which a spore develops

primary oocyte

..., diploid cell in prophase 1 of meiosis that can be hormonally triggered to develop into an ovum

pupae

..., dolls

protogynous

..., female first wrasses

archegonia

..., female gametangia

zygote

..., fertilized egg

regeneration

..., forming again (especially with improvements or removal of defects)

plasmogamy

..., fusion of cytoplasm

larvae

..., immature insects that do not look like adult insects

fertilization

..., making fertile as by applying fertilizer or manure

sporangia

..., multicellular organs that produce spores

medusa

..., one of two forms that coelenterates take: is the free-swimming sexual stage in the life cycle of a coelenterate and has a gelatinous umbrella-shaped body and tentacles

homosporous plant

..., produce single bisexual spore type.

heterosporous plant

..., produce two types of spores, some yeild male gametophytes (microspores) and others produce female gametophytes (megaspores).

budding

..., reproduction of some unicellular organisms (such as yeasts) by growth and specialization followed by the separation by constriction of a part of the parent

fission

..., reproduction of some unicellular organisms by division of the cell into two more or less equal parts

gonads

..., reproductive glands-male, testes; female, ovaries

fragmentation

..., separating something into fine particles

external fertilization

..., the process by which the female lays eggs and the male fertilizes them once they are outside of the female

oogenisis

..., the production of mature egg cell

syngamy

..., the union of gametes in fertilization

parthenogenisis

..., unfertelized birth

protandrous

..., when the male part of a flower matures first

alternation of generations

A life cycle in which there is both a multicellular diploid form, the sporophyte, and a multicellular haploid form, the gametophyte; characteristic of plants.

gametophyte

the gamete-producing individual or phase in the life cycle of a plant having alternation of generations


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