It is one of the survival strategies. Such a species will depend on an extremely fast reproduction rate. Typically such organisms have many offspring (no plural, by the way), they would reach sexual maturity quickly, and usually (though not necessarily) have a smaller body size. Parental care in animals would typically be limited if any - though, again, arguably, there are exceptions.
All in all, these organisms rely on sheer numbers to ensure the survival and propagation of the species. It works very well in unstable enviroments, and less well in stable environments. One possible downside is that these organisms can quickly exhaust the carrying capacity of the habitat, causing a rapid crash in population number.
This survival strategy is explained by the r-selection strategy, named after the growth rate variable in population dynamics.
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All living things (organisms) produce offspring. They can do it sexually or asexually (without sex).
rabbits, humans, cats, frogs, dogs, flowers
frogs produce thousands.
adaptation
There are so many combinations of traits in offspring because organisms are so complex. Even if somebody has brown eyes, for example, they might have a recessive gene for blue eyes, which they could pass to one or all of their children.
Organisms that are less fit can die before they reproduce. This is statistically more likely for such organisms. Organisms that are less fit have problems getting mates as they are passed over in greater numbers than fit organisms. Organisms that are less fit can not bring the offspring to term and provide as well for the offspring as fit organisms can. Organisms that are less fit pass on to their progeny the genetic insults that they carry, thus their offspring are less fit also. And many other reasons could be thought of here, so you think of some reasons yourself.
A species is a group of organisms so similar to one another that they can interbreed/reproduce.
Frog spawn has a high mortality rate because of predators and other factors. Therefore the more offspring the frogs have, the greater the chance the offspring have of reaching maturity and continuing the species.
It is said that in a day the puffball fungus releases enough spores to cover the Earth's surface 6 times with its offspring, so I'm assuming a normal fungus, although doesn't produce that large an amount, produces millions.
They produce offspring so that organisms species doesn't become extinct!
There are so many combinations of traits in offspring because organisms are so complex. Even if somebody has brown eyes, for example, they might have a recessive gene for blue eyes, which they could pass to one or all of their children.
Organisms that are less fit can die before they reproduce. This is statistically more likely for such organisms. Organisms that are less fit have problems getting mates as they are passed over in greater numbers than fit organisms. Organisms that are less fit can not bring the offspring to term and provide as well for the offspring as fit organisms can. Organisms that are less fit pass on to their progeny the genetic insults that they carry, thus their offspring are less fit also. And many other reasons could be thought of here, so you think of some reasons yourself.
birds willinbreed with each other but so did dinosaurs back in the day on a small island in the tropics about 30 million years ago
A species is a group of organisms so similar to one another that they can interbreed/reproduce.
So that they can unite as one to produce offspring.
So they can produce healthy offspring.
It is called speciation. Speciation can happen through adaptation, which is a change in an organisms genetic code. If adaptation has gone on long enough so that the two organisms can no longer produce offspring, then speciation has occurred.
Frog spawn has a high mortality rate because of predators and other factors. Therefore the more offspring the frogs have, the greater the chance the offspring have of reaching maturity and continuing the species.
There are more than 0 humans, so yes we produce more offspring than needed to survive, however humans aren't often hunted or killed by other species so it would be difficult not do. Usually animals have many more offspring than humans do, but they are also part of the natural food chain, so that is needed to survive.
Opossums have 13 teats so can have no more than 13 offspring. Any others beyond 13 will die..
reproductive isolation