| 单词 | reproductive structure |
| 释义 | reproductive structure (once / 5909656 pages) n WORD FAMILY reproductive structure: reproductive structures USAGE EXAMPLES"This is the first time in vertebrate evolution that males and females developed separate reproductive structures," Long says in a statement. The Verge(Oct 21, 2014) Further, the roots, seeds, and the whole reproductive structure of the coal-measure plants are all present in an unequalled state of preservation. Various, The Galaxy—Vol. 23, No. 1(2010) n the parts of a plant involved in its reproduction Hypo|Hyper agamete an asexual reproductive cell fructificationorgans of fruiting (especially the reproductive parts of ferns and mosses) glebafleshy spore-bearing inner mass of e.g. a puffball or stinkhorn hymeniumspore-bearing layer of cells in certain fungi containing asci or basidia spore case, sporocarpspecialized leaf branch in certain aquatic ferns that encloses the sori or clusters of sporangia bloom, blossom, flowerreproductive organ of angiosperm plants especially one having showy or colorful parts stamenthe male reproductive organ of a flower antherthe part of the stamen that contains pollen; usually borne on a stalk pistilthe female ovule-bearing part of a flower composed of ovary and style and stigma style(botany) the narrow elongated part of the pistil between the ovary and the stigma stigmathe apical end of the style where deposited pollen enters the pistil ovarythe organ that bears the ovules of a flower ovulea small body that contains the female germ cell of a plant; develops into a seed after fertilization placentathat part of the ovary of a flowering plant where the ovules form placentationarrangement of the ovules in the placenta and of the placentas in the ovary episperm, seed coat, testaprotective outer layer of seeds of flowering plants endospermnutritive tissue surrounding the embryo within seeds of flowering plants gemmasmall asexual reproductive structure in e.g. liverworts and mosses that detaches from the parent and develops into a new individual cone, strobile, strobiluscone-shaped mass of ovule- or spore-bearing scales or bracts basidiuma small club-shaped structure typically bearing four basidiospores at the ends of minute projections; unique to basidiomycetes antheridiumthe male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers sporangium, spore case, spore sacorgan containing or producing spores ascussaclike structure in which ascospores are formed through sexual reproduction of ascomycetes sporophorea spore-bearing branch or organ: the part of the thallus of a sporophyte that develops spores; in ferns and mosses and liverworts is practically equivalent to the sporophyte gametangiumcell or organ in which gametes develop gametoeciumgametangia and surrounding bracts gametophorea modified branch bearing gametangia as in the thalloid liverworts soruscluster of sporangia usually on underside of a fern frond sorusa spore-producing structure in certain lichens and fungi fruitthe ripened reproductive body of a seed plant edible fruitedible reproductive body of a seed plant especially one having sweet flesh sporea small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion juniper berryberrylike fruit of a plant of the genus Juniperus especially the berrylike cone of the common juniper floret, flowereta diminutive flower (especially one that is part of a composite flower) apetalous flowerflower having no petals inflorescencethe flowering part of a plant or arrangement of flowers on a stalk ray floret, ray flowersmall flower with a flat strap-shaped corolla usually occupying the peripheral rings of a composite flower buda partially opened flower simple pistilconsists of one carpel compound pistilconsists of two or more fused carpels pistillodea sterile vestigial pistil remaining in a staminate flower stylopodiuman enlargement at the base of the style in some Umbelliferae carpela simple pistil or one element of a compound pistil amphitropous ovulea partly inverted ovule turned back 90 degrees on its stalk anatropous ovulea completely inverted ovule turned back 180 degrees on its stalk campylotropous ovulea curved ovule with the micropyle almost touching the funiculus orthotropous ovulea completely straight ovule with the micropyle at the apex apical placentationwhere one or few ovules develop at the top of a simple or compound ovary axile placentationovules are borne at or around the center of a compound ovary on an axis formed from joined septa basal placentationwhere one or few ovules develop at the base of a simple or compound ovary free central placentationwhere ovules develop on a central column in a compound ovary lacking septa or with septa at base only lamellate placentationwith ovules on thin extensions of the placentae into a compound ovary marginal placentation, ventral placentationwith ovules borne on the wall along the ventral suture of a simple ovary parietal placentationwhere ovules develop on the wall or slight outgrowths of the wall forming broken partitions within a compound ovary fir conethe seed-producing cone of a fir tree galbulusthe seed-producing cone of a cypress tree pineconethe seed-producing cone of a pine tree seeda mature fertilized plant ovule consisting of an embryo and its food source and having a protective coat or testa macrosporangium, megasporangiuma plant structure that produces megaspores microsporangiuma plant structure that produces microspores May appleedible but insipid fruit of the May apple plant chrysanthemumthe flower of a chrysanthemum plant achenesmall dry indehiscent fruit with the seed distinct from the fruit wall corn silk, cornsilkeach of the long filamentous styles that grow as a silky tuft at the tip of an ear of Indian corn gourdany of numerous inedible fruits with hard rinds prairie gourdsmall hard green-and-white inedible fruit of the prairie gourd plant blue fig, quandongthe fruit of the Brisbane quandong tree acornfruit of the oak tree: a smooth thin-walled nut in a woody cup-shaped base olivesmall ovoid fruit of the European olive tree; important food and source of oil hip, rose hip, rosehipthe fruit of a rose plant wild cherrythe fruit of the wild cherry tree marascasmall bitter fruit of the marasca cherry tree from whose juice maraschino liqueur is made hagberrysmall cherry much liked by birds chokecherrythe fruit of the chokecherry tree rowanberrydecorative red berrylike fruit of a rowan tree buffalo nut, elk nut, oil nutoily drupaceous fruit of rabbitwood promyceliumthe basidium of various fungi antheridiophoregametophore bearing antheridia as in certain mosses and liverworts eusporangiuma sporangium that arises from a group of epidermal cells leptosporangiuma sporangium formed from a single epidermal cell; characteristic of the Filicales or of almost all modern ferns tetrasporangiuma sporangium containing four asexual spores gynoeciuma female gametoecium androeciuma male gametoecium capitulum, ear, spikefruiting spike of a cereal plant especially corn fruitleta diminutive fruit, especially one that is part of a multiple fruit seeda small hard fruit berrya small fruit having any of various structures, e.g., simple (grape or blueberry) or aggregate (blackberry or raspberry) aggregate fruit, multiple fruit, syncarpfruit consisting of many individual small fruits or drupes derived from separate ovaries within a common receptacle: e.g. blackberry; raspberry; pineapple drupe, stone fruitfleshy indehiscent fruit with a single seed: e.g. almond; peach; plum; cherry; elderberry; olive; jujube false fruit, pomea fleshy fruit (apple or pear or related fruits) having seed chambers and an outer fleshy part pod, seedpoda several-seeded dehiscent fruit as e.g. of a leguminous plant pyxidium, pyxisfruit of such plants as the plantain; a capsule whose upper part falls off when the seeds are released accessory fruit, pseudocarpfruit containing much fleshy tissue besides that of the ripened ovary; as apple or strawberry buckthorn berry, yellow berryfruit of various buckthorns yielding dyes or pigments cubebspicy fruit of the cubeb vine; when dried and crushed is used medicinally or in perfumery and sometimes smoked in cigarettes schizocarpa dry dehiscent fruit that at maturity splits into two or more parts each with a single seed plant organ a functional and structural unit of a plant or fungus |
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