sexual reproduction in which one of the gametes (the egg) is large and nonmotile and the other gamete (the sperm) is smaller and motile
a dry dehiscent seed vessel or the spore-containing structure of e.g. mosses
the male sex organ of spore-producing plants
female reproductive part of a nonvascular plant
small multicellular spheres that contain many haploid cells. produced in cuplike structures and when washed out the cells can divide by mitosis to produce a new individual
sporophyte of a fern
New World fern having woolly cinnamon-colored spore-bearing fronds in early spring later surrounded by green fronds
cone that produces female gametophytes
plant stems that run above and along the ground and form a new plant near the main plant.
the fine spores that contain male gametes and that are borne by an anther in a flowering plant
the apical end of the style where deposited pollen enters the pistil
(botany) the whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the developing bud
(botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth
creation by the physical union of male and female gametes
transfer of pollen from the anther to the stigma of a plant
a reproductive process in which pollen from one plant is transferred to the stigma of another plant
the ripened reproductive body of a seed plant
a mechanism of fertilization in angiosperms, in which two sperm cells unite with two cells in the embryo sac to form the zygote and endosperm.
the process whereby seeds or spores sprout and begin to grow
a form of asexual reproduction in which plants produce genetically identical offshoots (clones) of themselves, which then develop into independent plants.
possessing both the male and female reproductive organs
series of segments swollen by large mucus glands, secretes mucus to hold worms together while they mate
plant structure containing undeveloped tissue that can produce new stems and leaves
(of hatchlings) covered with down and having eyes open
The copulatory embrace of frogs and toads, during which the male fertilizes the eggs that are released by the female.
a number of birds hatched at the same time
The white tooth on the end of the chick's beak that helps the chick in hatching.
the time of life when sex glands become functional
the expulsion of an ovum from the ovary (usually midway in the menstrual cycle)