Some animals lay more eggs because of larger penises = simple method bigger willy more fertilization.
it all has something to do with their uterouse
cause they're lazy bums
It has something to do with the fecundity of the organism. Some organisms release only one egg at a time, so only one egg gets to be fertilized. Smae goes with the animals that release multiple eggs at once, the eggs can be fertilized all at the same time.
Terrestrial animals can't just release sperm into their environment to fertilize eggs, where as some aquatic animals can, because sperm needs water to fertilize
Due to evolution, some animals need to make more eggs if there is a higher chance of predators taking some of the eggs.
GiraffesElephantsRhinosPenguinsOrangutansWhalesSnakesTurtlesChickenMosquito
All fish come from eggs. Some fish lay eggs and male fertilize them some fish are like humans and animals the egg developes inside the fish and live birth happens.
The answer is yes. Fish do need at least one male in the tank to fertilies the eggs. However in some cases the fish will first lay the eggs then the male will fertilize them.
A common misconception about hermaphroditic animals is that they can self-fertilize their eggs and always do so. In reality, while many hermaphrodites possess both male and female reproductive organs, they often engage in cross-fertilization with other individuals to increase genetic diversity. Additionally, not all hermaphrodites can self-fertilize; some species have mechanisms to prevent it. Thus, the reproductive strategies of hermaphroditic animals are more complex than simply being able to self-reproduce.
To increase the chance of it being fertilised
She knows, she just doesn't care. Egg laying is more biological, the body doing what it is meant to do. Taking care of the eggs is mental, some birds are just not the mothering type. If there is not a male to fertilize the eggs, she may realize that there is no point in sitting on them.
Not all animals have placentas because they lay eggs instead. Only mammals have placentas by the way. Other animals use eggs and amniotic eggs.