External fertilization means that it takes place outside of the body, which also means the eggs and sperm are exposed to a lot more danger, and that the chances of a successful fertilization are lower.
Because of this, the amounts produced are much higher to give a reasonable chance that there will be offspring.
The types of creatures that lay hundreds of eggs instead of two or three at a time do so because they don't plan to be around to raise the babies, and having many hatch at one time increases the chances of their young to survive to adulthood.
they lay large amounts of eggs so that there is a chance of them surviving.
For example for fish, frogs and corals they release many eggs to ensure survival of that particular species as the majority will not survive or not be fertilised.
because the eggs develop outside of the mothers body they are more vulnerable so the mother lays more eggs to increase the chances of them surviving
because their are to many eggs! x
oviparous animals live in more harsh environment and thus lay large number of eggs compared to viviparous animals. this high multiplication ensures that few of the eggs get fertilized (external fertilization) and develop into young once.
Animals like reptiles (ex. snakes, turtles), birds, sharks, and mammals (ex. humans) undergo internal fertilization.Animals like some fish (ex. salmon), hydra, coral, sea urchins, amphibians (ex. frogs) undergo external fertilization.
Picture of animals hatched from egg
External fertalisation is when the eggs are outside the body and the sperm is droped into them allso outside and the babys grow outside the body like fish eggs!!! If you want to see a little clippet of baby eggs watch finding nemo!!!!!!!xoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxo
Turtles
produce more eggs
There are thousands of such vertebrates as bony fishes .
Internal fertilization is like animals having sex....the egg is fertilized on the inside. External is when the egg is fertilized on the outside (like when frogs lay eggs and they need to be fertilized before they can hatch).
The term "external reproduction" for higher animals means in eggs rather than internally. So the hawk reproduces externally, laying and hatching its eggs.
all animals have eggs, but it depends their fertilization development type (which is either internal or external). Humans are mammals, and all mammals give live birth unless it is a monotreme, which lays eggs.
oviparous animals live in more harsh environment and thus lay large number of eggs compared to viviparous animals. this high multiplication ensures that few of the eggs get fertilized (external fertilization) and develop into young once.
External. In most cases, adults release sperm and eggs into the surrounding water, where the (unprotected) eggs are fertilized and mature into new organisms.
Internal because they give birth and not lay eggs. If they lay eggs, they would be like a chicken. ~Savannah B.
external baby penguins hatch from eggs
External, because they lay eggs.
Vertebrates that use internal fertilization tend to produce fewer eggs because almost all of their eggs are fertilized. With animals that use external fertilization, a number of eggs are never fertilized. With some animals like oysters, the males release a tremendous amount of sperm and the females release a tremendous number of eggs, but it is hit or miss if n egg will be fertilized as it floats along. A woman only needs to produce one egg to get pregnant. She can look after that baby for a few years before she gets pregnant again. just as many oysters as children are likely to survive to adulthood.
The salmon reproduces externally. The female salmon will lay the eggs and then the males will shoot their semen on top of the eggs to fertilize them.