DEFINE:
1.-TYPE PLAY THAT EXISTS IN PLANTS,
There are two types of plant reproduction: asexual reproduction and sexual reproduction. In a plant with asexual reproduction, it generates new individuals from the vegetative organs, so also bears the name of "vegetative propagation." In contrast, sexual reproduction the gametes should intervene and give the process called fertilization (or syngamy). In a first approximation, we recognize that asexual reproduction is under the rapid spread of the plants because many bodies are generated in a short time is failing, however, that all agencies are equal, then if a disturbance occurs in the environment it is likely that all affected.
In contrast, plant reproduction sexual type is slower: it takes a special generation, the gametophyte, to produce gametes, and reproductive structures usually take time to develop. In turn, the advantage to have this type of reproduction is the variability, because children are not identical to the parent, and this is very beneficial because it generates evolution.
2 .- CLASS, PART OF THE FLOWER THAT THERE
flowers with sepals, petals, stamens and carpels are called complete and incomplete that no one of these whorls. Some flowers may have 2 or more whorls of sepals or petals. When you lack the perianth is said that the flower is hermaphrodite lacking perianth or naked, like willows and poplars. The flowers are unisexual when they lack the androecium or gynoecium, if only takes pistils, it is said that the flower is pistillate or female, and staminate or male leads with only stamens. When the male or female flowers are all grouped in the same plant foot, it is said that the species concerned is monoecious, and dioecious when every foot of plant has flowers of one sex. Typical flowers are bisexual or hermaphrodite (with androecium and gynoecium located in the same flower)
PART OF A FLOWER A flower is typical consists of four types of floral leaves that are sepals, petals, stamens and pistil.
The female reproductive organ is the pistil and the ovary the ova (rudiment)
The male reproductive organ is the stamen in which politicians are sacks of pollen grains (male gauretofito)
Sepals. - They are the cup, first shell of the flower, usually green and is shaped like a leaf. Petals .-
together form the corolla, second shell. Bright color are used to attract insects.
.- The yarn together form the stamens, is formed by the filament and anther. The Antara is composed of four pollen sacs or microsporangios, to develop these structures form the microspores and these form the pollen grains (male gametophyte). Each of these cells contains two haploid nuclei. To germinate the pollen tube sperm nuclei of these male gametes, the other core is not split. The pistil .-
together form the gynoecium can be simple. Example "pea flowers" made "strawberry flowers." The pistil consists of three parts: the ovary, style and stigma.
ARE
3.-staminate flowers, give examples.
staminate flowers (ie "male") are those with functional stamens, capable of producing pollen, but do not have ovarian cancer, or have one ovary that is not fertile.
4.-WHAT ARE THE FLOWERS.
It is the non-reproductive flor.Está formed by two types of parts.
The corolla is formed by the petals that are colored pieces of flowers. Its function is to attract pollen-bearing animals.
The cup that the green part of the flower. Its consistency is stronger than the corolla and its parts are called sepals.
Sometimes the petals and sepals are the same color, then I called tepals.
is the male part of the flower. It consists of the stamens that are not nothing but some leaves have been transformed in order to carry pollen. Each stamen has two parts:
The top strand carries a "bag" over it loaded with pollen.
The anther is the "bag" are locked up top where the pollen grains.
5.-ESTABLISH THE DIFFERENCE THAT THERE
pollination and fertilization Fertilization is the substance or application of natural or synthetic chemical mixture used to enrich soil and promote plant growth. And the passage is pollination of pollen from the male apparatus of plants to the female unit. This process can be done in different ways. Zoophilic pollination: When performed by various animals such as insects (pollination by insects), birds (pollination ornithophilous) etc. that carry the pollen on their bodies. Wind pollination: When the wind is responsible for carrying pollen. Occurs in plants but inconspicuous flowers that produce large quantities of pollen, such as pines. Self-pollinating Pollination: when pollen from the stamens of one plant falls on the stigma of the same plant.
6.-DEFINING AND FERTILIZATION FERTILIZATION.
See definition questions 5, fertilization. And fertilization is the fusion of two sex cells or gametes during sexual reproduction, resulting zygote cell where they are now the chromosomes of the two gametes. In animals, gametes are called sperm and egg, respectively, and the zygote cell division forming part of an embryo, whose development is derived from the adult individual. In plants, fungi and protists fertilization patterns are very diverse, and the gametes are different names.
7.-Fabor WHAT ARE THE FACTORS THAT MAY PREVENT OR LIMIT THE SELF POLLINATION OF PLANTS:
Influence of climatic factors, temperature and rain
8.-
IS A parthenogenesis.
Parthenogenesis is a form of reproduction based on the development of unfertilized female sex cells, which occurs with some frequency in flatworms, rotifers, tardigrades, crustaceans, insects, amphibians and reptiles, more rarely in some fish and, in exceptional birds . Parthenogenesis was discovered by Charles Bonnet. Jan Dzierzon was first discovered parthenogenesis in the drones of abejas.Puede interpreted either as asexual or sexual reproduction monogamética, since it is involved in a sex cell or gamete
9.-O IS APOGAMIA APOMISIS.
Production embryo without fertilization. 10.-
KINDS OF CHANGES TO EXIST IN THE SPECIES. Individual differences
doubtful species common species, widely distributed and widespread are the most varied
species of the larger genera in each country vary more frequently than species of smaller genera
Many species included in the larger genera varieties appear to be closely related to each other, though not equally, and have restricted geographic distribution
Summary In conclusion, the varieties can not be distinguished from the species, except: first, by discovery of intermediate links, and second, for some indefinite amount of difference between them, as if two forms differ very little are generally classified as varieties. 11.-
HERITABILITY IS AND WHY IT IS IMPORTANT TO THE POINT OF VIEW OF PLANT BREEDING.
We note that the genotypes are part of that calculated to be of heritability and genetic advance for plant breeding, and they are important because
calculate the variation is due to genes and the environment. Genotype is the genetic content (the specific genome) of an individual in the form of DNA. Along with the environmental variation that influences the individual, the phenotype encodes individual. Otherwise, the genotype can be defined as the set of genes of an organism,
Study biotechnological techniques being used and serve as a tool for the improvement of plants, means
Implement and apply the aid of selection, point of view of plant breeding.
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