There are many ways that life (living creatures) began there is the christian version, the greek version, the science version, the Muslim version and many more but I am only including the christian version and the science version in this article, if you wish to find out more try Wiki:
Christian (Genesis):
On the first day (the beginning) God created the heavens and the Earth. Then God created light, and God saw that the light was good and so he separated the light from the darkness and he named the light day and the dark night. And there was evening and there was morning, the second day.
God said "let there be waters, but let the land come through!" and so it was there was water and the land came through. God called the waters the sea and the land Earth. Then God created plants and vegetation, and he saw that it was good. And there was evening and there was morning the third day.
God said "Let there be small lights in the heavens at night, and let them be for signs and for guidance, for seasons and for days." and so it was the stars were created. And then God created two bigger lights, the better light to rule the day and the lesser light to rule the night. And God saw that it was good, and there was evening and there was morning, the fourth day.
God said "Let the waters crawl with living creatures, and let the skys be filled with birds of all kinds." and it was so, God created the great sea creatures and the birds that rome the skys. And God blessed the creatures, then he saw that it was good and there was evening and there was morning, the fifth day.
God then created the great creatures and insects of the lands. And God saw that it was good.
Then God made man, he scooped up some clay from the Earth and made the shape of man in his image and there was man. And God saw that it was good and there was evening and there was morning the sixth day.
God was tired after all this time so he chose that day as a Holy day, a day for worship and for rest. And there was evening and there was morning, the seventh day.
The Science version:
When the big bang happened the Earth was created (obviously), then Planet X (Thiu) crashed into the Earth and small chunks were taken out of it which later formed the Moon. Now at this time most of the world was covered in sea and because then the moon was so close to the Earth, it created huge tidal waves over 1000 metres high, going at 200 miles per hour and covering the whole of the Earth!!! As the waves formed they gathered tiny bits of minerals from the Earth and over billions of years tiny single celled-organisms were formed. Then they grew and grew until they evolved into bits of bacteria that using the light evolved over billions of years into algie, like what we get in ponds and things. Then slowly they evolved into plankton, then tiny little shrimps, small fish and then over the years into bigger forms of sea life.
But the sea wasn't enough for them, some of the fish began to leap out of the water onto land to aviod predaters and soon some fish were spending more time on the land then they were in the water and so instead of fins they developed legs forming land creatures!
But land wasn't enough for them and some of the land creatures started jumping up in the air to aviod other animals (predators) and later on they stated to grow (instead of legs) wings and they formed birds!!!
a frogs life begins underwater in an egg then it hatches turns into a tadpole
it starts off as a tadpole
a cycle of a frog in real life.so a egg at first.embryo,tadpole,front legs break through,start of pulmonary breathing,tadpole frog then a adult frog!
The frog has three distinct stages of development in its life cycle.
There are numerous number of life cycles in a frog's life cycle but it is best to say that the frog has 3 stages.The stage are the egg stage, the tadpole stage (young) and the adult stage (frog)!
what is the first stage of a life cycle of a frog
a predator
Yes, Yes it does!
Egg, tadpole, young, frog
they both have 5 main stages
the frog goes through a metamorphasis
An Ostrich doesn't become a tadpole. Also it won't spend most of it's life in water.
tadpole
Metamorphosis