Ovipary, vivipary and ovovivipary, Biology

Assignment Help:

Ovipary, Vivipary and Ovovivipary

In each case of external and in some cases of internal fertilisation, development of the fertilized egg (zygote) occurs outside the mother's body. The egg is laid either in water or in soil, on plants, or in the body of their hosts in case of specific parasites. Ail such animals or called oviparous (laying eggs). A number of exceptional cases of non-chordates showing, vivipary that is giving birth to young ones nourished by the genital tracts of the female, are found in some insects like tsetse fly (Glossina). A third condition is that of Ovovivipary. In this case, after fertilisation the zygote is retained in the female reproductive system with no any direct connection with the maternal tissues for providing nourishment. Here it undergoes development. Finally the eggs hatch still inside the female and the young ones are "born". This happens for instance in certain flies.


Related Discussions:- Ovipary, vivipary and ovovivipary

Digestive system, Explain the process by which the kidney varies the volume...

Explain the process by which the kidney varies the volume and concentration of urine

Paleomon., coxa of paleomon contain specialised organ called

coxa of paleomon contain specialised organ called

Pulsatile perfusion-type of blood pump, Pulsatile Perfusion: Conventional...

Pulsatile Perfusion: Conventional pumps give continuous flow with very little pulsatile property. Pulsatile perfusion is likely to result in better post operative renal and cardi

Determine the principles of Behavioural neuropsychology , Determine the pri...

Determine the principles of Behavioural neuropsychology Behavioural neuropsychology approaches are based on the principles of learning theory and behavioural modification. Beh

Determine the final cell volume, Find the initial osmotic pressure at room ...

Find the initial osmotic pressure at room temperature for a cell if the only ions present are KCl and NaCl on either side of the membrane. Assume the concentrations for K+ and Na+

Define endocrine or hormonal disorders - infertility, Define Endocrine or H...

Define Endocrine or Hormonal Disorders - Infertility Infertility can be caused by endocrine disorders, long-term sequelae of sexually, transmitted infections, puerperal sepsis,

Is cell division happening during the entire cell cycle, Is cell division h...

Is cell division happening during the entire cell cycle? What is interphase? Cell division properly happens during the mitotic phase of the cell cycle. During interphase proces

Sedentary or light activity lifestyles - physical activity, How Sedentary o...

How Sedentary or light activity lifestyles affects Physical Activity? These people have occupations that do not demand much physical effort, we not required to walk long distan

Explain nutritional assessment and guidance in prenatal care, Explain Nutri...

Explain Nutritional assessment and Guidance in Prenatal Care? In the preceding sections, we have seen that there are unique physiologic changes in the pregnant woman's body, wh

Define methods of estimation of ascorbic acid (vitamin c), Define Methods o...

Define Methods of Estimation of Ascorbic Acid (Vitamin C)? Ascorbic acid is also known as vitamin C which is a water soluble vitamin. As you already know, vitamins are a group

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd