How to use ovule in a sentence

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Sentence Examples In only one pollination did a pollen tube appear to enter the ovary, but not the ovule. For example, low temperatures near flowering affect ovule development and pollen tube growth. Tieghem placed Aquifoliaceae near Solanaceae because of the unitegmic ovule and the isomerous stamens alternating with the petals. Ovule position was determined by counting each ovule from the stylar end to the basal end of the ovary. However, at anthesis they appear one above the other, because in one ovule the funicle greatly elongates. Each growing ovule is seen attached to the pod wall via a funiculus, and the ovule has initiated a curved and bent orientation. During pollination the female portion of the plant receives pollen from the tassel, resulting in fertilization of the ovule. Legumes possess highly differentiated seed coats that arise from the inner and outer integuments of the ovule. Moreover, we did not observe increased levels of seed or ovule abortion in any seth mutants. Maternal apomictic embryos develop from a somatic cell within the ovule or from an unreduced embryo sac derived from the megaspore mother cell. However, pollen tubes from control pollen showed normal morphology when growing towards the micropyle of an ovule in a HTS plant. They have investigated, over three seasons, the development process from ovule to viable seed. If a third ovule is present, it is obliquely directed and its placenta is lateral. For a 30-year old woman having ingested this water all of her life the number of tritium disintegrations would be about 8 per ovule. Each carpel has a terminal stigma and a basal ovary with a single ovule. The ovule is an immature seed, which does not yet contain a viable embryo. In many legumes, seeds are arranged linearly within the pod, making it relatively simple to study the effect of position of the ovule on seed abortion and seed set. It is formed before the ovulation and awaits a fecundated ovule to implant. All our cells contain the same genetic program, that of the egg-cell resulting from the fusion of a spermatozoon and an ovule. An egg is an ovule that has been fertilized by a spermatozoon, the male reproductive cell. Show More Sentences During development of the ovule, the inner of the two integuments disappears, while the outer integument differentiates into different layers of the seed coat. In apomixis, an embryo is created from a diploid cell in the ovule. The flowers are protandrous, and larger plants have a lower pollen to ovule ratio than smaller plants, suggesting larger plants invest proportionally more in female function. The ovulate cones are simpler, with each scale subtending a single ovule and two small scales. There is obviously a connection with procreation, but no eggs or ovule is visible in this biotope. In pre-zygotic mechanisms, the pollen tube may grow as far as the ovule but not penetrate it, or penetration may be achieved without fertilization. Aposporous embryo sacs were identified easily due to the lack of antipodal cells and because they showed varying positions and orientation within the ovule. Study of ovule and megagametophyte development in four species of subtribe Phaseolinae. Such varying differentiation of different parts of the ovule accounts for the occasional confusion of anatropous and campylotropous ovules. Following pollination and fertilization, the ovule developed into a seed with an embryo nested in the fleshy female gametophyte, which served as a food source during germination and seedling growth. The female cone develops two ovule, each of which contains haploid haploid megaspores. The ovary is inferior, bearing a single anatropous ovule with a long tube-like style. The pollen tube enters the opening of the ovule, the micropyle, and reaches the interior of the ovule to undergo spenn release and fertilization. The ovary is bilocular with single ovule per locule and the placentation is axile. Comparative ovule and megagametophyte development in Hydatellaceae and water lilies reveal a mosaic of features among the earliest angiosperms. The seed originates from anatropous, bitegmic, crassinucellate ovule. Examples from Classical Literature We have already examined in some detail the structure of the macrosporangium or ovule. The ovule is curved upon itself, so that the micropyle is near the funicle. The development of the ovule in the womb is known as gestation or pregnancy. Every ovule has a tiny opening, or micropyle as it is called, and it is now easy to guess what that is for. We have seen that the ovule from the ovary is the female egg, or principle. The ovule or egg is now in the cavity of the womb where we will leave it for the present. Before a child is possible, however, the ovule must meet the egg from the male. That the seed inherits equally from the ovule and the pollen grain is a truth that should be impressed in many ways. Each ovule, which is reached by a pollen tube, swells up and becomes a seed. The ridge or adnate funicle which in an anatropous ovule connects the two ends. The ovule is a part of every ovary just as the pollen is a part of every anther. Each13 ovary contains only one ovule, and when the seed ripens, the carpel does not open to discharge it, but drops with the seed. The pollen grain is like the ovule in structure, only much smaller. After the embryo sac in fertilized by the pollen tube, the ovule gradually turns into a seed, and the carpel becomes a fruit. It is a fertilized ripened ovule, capable of reproducing and developing into a plant. Tomlinson incorporated morphological and physiological aspects of ovule behaviour in his analysis of the evolution of pollination mechanisms. Take the ovule of the worm, the eagle, the elephant, and of man himself. Hilum, the place of junction of the funiculus with the body of the ovule. The point upon the seed at which was the orifice of the ovule. Chalaza, the place where the coats and the kernel of the ovule blend. Find more words! 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What is the opposite of ovule? Words that rhyme with ovule What is the plural of ovule? What is the adjective for ovule? What is the noun for ovule? Use our Sentence Generator Nearby Words ovulation ovulating ovulated ovulate ovular ovoviviparous ovules ovum ow OWA owe owed 5-letter Words Starting With o ov ovu ovul