معلومات قصير موضوع انجليزي بحث تقرير بالانجليزي باللغة الانجليزية انشاء
موضوع عن الحيوانات الاليفة  وانواعها  اين تعيش ماذا ياكل مدة حياتها اسماء صغارها
تعبير عن الجمل بالانجليزي تعبير كتابي عن وصف حيوان اليف عبارات قصيره للاطفال
information about    paragraph معنى برزنتيشن  معلومات بسيطه  اسم  نطق كلمة معنى كلمة برجراف حيوان مفترس لاحم عاشب اليف متوحش وحيش الغابة موسوعة عالم الحيوانات برمائي كل شيئ عن تزاوج انواع الانجليزي  الشائعة معنى كلمة بالانجليزي اختصارات البيض 
معلومات عن الحيوانات بالانجليزي موضوع عن الحيوانات الاليفة بالانجليزي دورة حياتها
تغذية الحيوانات والحشرات على ماذا تتغذى كيف تتغذى الموسوعة تتذوق الطعام تصنيف

فوائد الجنس للصف الرابع للصف السابع الاول الثاني الثالث الخامس السادس الثامن التاسع كتابة  ذكر اضرار  معلومات طائر انواع  تربية قصة صفات حديقة الحيوانات مقدمة خاتمة عرض المزرعة لرياض الأطفال براعم لائحة اسماء الحيوانات العاشبة اللاحمة حيوانات تاكل النباتات مختلطة التغذية تتغذى الغريزة الحيوانية الكائنات المخلوقات  الحياة البرية الولودة 

The oviparous, viviparous or ovoviviparous animal develops differently before birth

The way animals develop before birth, defines whether it is a viviparous, oviparous, or ovoviviparous animal. The mode of reproduction is not a factor. In the case of birds that all lay eggs, and so are all oviparous animals, it's pretty easy, but for snakes, that's another thing.




By definition, an oviparous animal lays eggs, as birds do, but without necessarily nesting and hatching. So, turtles, many reptiles and snakes are oviparous animals, even if they do not brood.
So insects, invertebrates, crustaceans, the majority of fish ... who also lay eggs without necessarily nesting or brooding, are also oviparous animals.

The egg contains the embryo of the animal, and it must continue to evolve outside the body of the female. It also contains 'food', the yellow, which is used to feed nutrients for the developing embryo. The female is no longer the source of nutrition of the small.

Once it is sufficiently developed, it is hatching, and the small breaks the shell of the egg to get out.

The viviparous animal gives him a little completely formed, and not yet in the embryonic state. Gestation is often longer, especially in large animals, and the small is fed by an umbilical cord. Once the little one is fully developed, it comes into the world, and depending on the kind of animal, the parents can take care of it, or just let it fend for itself.

In the case of mammals, which are viviparous animals, the mother is usually the one who takes care of feeding and protecting the young, until they are adults. The marsupials are an exception, because the little one is not very formed when it goes up in the ventral pocket to continue its development.

The ovoviviparous animals themselves, are a little a mixture of both modes, the time of development of the embryo. After mating, the female produces eggs, but she does not pit them, or, as for the hippocampus, she transfers them to the male who wears them in a ventral pocket. The development of embryos is like the egg of a bird. Nutrition is not produced by the mother, or the male, being contained in the egg.

When birth comes, hatching is done in the mother's womb, and the little developed ones come out as for a viviparous birth. Some snakes, reptiles and fish give birth to completely formed cubs instead of laying eggs.

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