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Pears are fruits produced and consumed around the world, growing on a tree and harvested in late summer into mid-autumn. The pear tree and shrub are a species of genus Pyrus / ˈ p aɪ r ə s /, in the family Rosaceae, bearing the pomaceous fruit of the same name.
In plants, this can effectively be a new species, reproductively isolated from its parents, and able to reproduce. Main article: Polyploid Polyploidy is a mechanism that has caused many rapid speciation events in sympatry because offspring of, for example, tetraploid x diploid matings often result in triploid sterile progeny. [ 76 ]
One of the outcomes of plant reproduction is the generation of seeds, spores, and fruits [13] that allow plants to move to new locations or new habitats. [14] Plants do not have nervous systems or any will for their actions. Even so, scientists are able to observe mechanisms that help their offspring thrive as they grow.
In the absence of sexual reproduction, the genetic composition of plant material being multiplied remains essentially the same as its source plant. Clones of mother plants can be made with the exact genetic composition of the mother plant. Superior plants are selected and propagated vegetatively; the vegetative propagated offspring are used to ...
Differences between plant and animal physiology and reproduction cause minor differences in how they evolve. One major difference is the totipotent nature of plant cells, allowing them to reproduce asexually much more easily than most animals. They are also capable of polyploidy – where more than two chromosome sets are inherited from the ...
Plant reproductive morphology is the study of the physical form and structure (the morphology) of those parts of plants directly or indirectly concerned with sexual reproduction. Among all living organisms, flowers , which are the reproductive structures of angiosperms , are the most varied physically and show a correspondingly great diversity ...
On top of the gradual growth of the plant, the image reveals the true meaning of phototropism and cell elongation, meaning the light energy from the sun is causing the growing plant to bend towards the light aka elongate. Plant growth and development are mediated by specific plant hormones and plant growth regulators (PGRs) (Ross et al. 1983). [10]
Dacryodes edulis is a fruit tree in the family Burseraceae native to Africa.Its various regional names include safou (Republic of the Congo, Democratic Republic of the Congo and Angola), messa, plum (), atanga (Equatorial Guinea and Gabon), ube, elumi/rukuki (), [2] [3] African pear, bush pear, African plum, nsafu, bush butter tree, or butterfruit.