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How do tadpoles develop without a placenta that links them to its mothers blood supply?
Wiki User
∙ 9y ago
They develop by feeding from the yolk of the egg that the frog has laid and that is the equivalent of a placenta.
Wiki User
∙ 9y ago
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Tadpoles and birds are examples of animals that develop without a placenta that links them to the mothers blood suply explain how these organisims develop?
The same way every animal before mammals evolved did it. The egg contains a yolk loaded with nutrients that they live off and the shell has pores that let air in and carbon dioxide out for their respiration.
How do animals develop without a placenta?
Animals that do not develop in a placenta will develop outside of the uterus rather than in. Kangaroos and Koalas use pouches to develop their young.
If your partner has HIV can you have a baby without transmitting it?
of course the mothers blood is transfered into the fetuses bloodstream throgh the placenta
How do birds develop without a placenta that links them to its mothers blood supply?
Instead of getting oxygen and nutrients directly from a mother, the bird egg contains these elements in the materials found around the bird embryo. Reptiles and amphibians have similar processes for supplying the embryo.
How do birds develop without a placenta?
Placenta is used by certain mammals to nurture embryos that will develop into a baby that will be born live. Birds, however, don't give birth to live young. Instead, they lay eggs, and the embryo inside the egg is nurtured by a nutrient and energy rich yolk sac, rather than by a placenta.
How can you save tadpoles without water?
you cant you cant
What is the role of the placenta during a pregnancy?
The placenta is an extremely complex piece of biological equipment. A little bit like an artificial kidney (dialysis machine), it allows your blood and the baby''s to come into very close contact without ever mixing
What is the use of placenta?
The placenta is what gives the baby blood, nutrients and oxygen from the mother while in the womb. Without the placenta, the baby would have no way of surviving.
Can baby sheep survive without their mother?
A baby goat (kid) should really get colostrum from its mother to help develop its immunity and it won't survive without its mothers milk unless you provide supplementary feed as in you need to feed it.
How do you kill tadpoles without damaging pool cover?
If tadpoles are resistant to pool chemicals, check your local hardware store for a chemical shock treatment. These are generally formulated to be gentle on pool equipment. It will mean staying out of your pool for a week or more, but the tadpoles will eventually die.
What are cells that can develop into a plant without fertilization?
The cell that can develop without fetilization are spores.
Why is the placenta called the baby's 'life-support' system?
THE PLACENTA is visibly formed at 12 weeks gestation. At about this point, the placenta takes over a very BIG job from moms hormones. The placenta is now 100 percent responsible for nourishing the fetus. The placenta attaches to the baby at the umbilical cord, or the "belly- button." The placenta is called the babys life support system because it provides everything the fetus needs to stay alive until birth. Without the placenta, the baby would die.
