Though there's a certain reasonableness to thinking of the "ancestral critter," the situation is more likely to have been that there were lots and lots of organic compounds which began to assemble into "not-quite-critters." These then joined with other "none-quite-critters" into "somethings-very-like-critters" and so on until, looking back on the matter, someone might have been able to say, "the ancestors of these were the first critters."
In other words, the line between organism and proto-organism is somewhat arbitrary.
In space there is no fixed time like earth. As there is 24 hours sun not like earth with day and night.
The earth doesn't cast any shadow on the moon. The moon appears partially in shadow because sunlight only hits it from one direction at a time. It appears perfectly cut in two with a straight line when sunlight is hitting the moon from a 90 degree angle to the earth. The only time the Earth casts a shadow on the Moon is during a lunar eclipse, and in those cases, the shadow, like the Earth, is round.
That's the only time when the moon is on-line between the Sun and Earth, so it's the only time when the moon's shadow can hit the Earth's surface.
like an asian penis
once
In space there is no fixed time like earth. As there is 24 hours sun not like earth with day and night.
The only thing left is time. If NASA finds a way to another Earth-like planet then most of us will survive. If we are out time than the six-billion people on EARTH will be in a better place (heaven). basically the only thing that will be left is time, Because time will some how keep going.
Each living organism lives in its own time frame. Human time is different to that of all other creatures upon this earth. Each have a time too live and a time to die. Their world or existence is different to human existance.
I wouldn't say that an organism is 'primitive', it's much better to state that the organism is philogenetically old (or older in comparison to other organism). Such statement means that a species has been on earth for a longer period of time than others.
That is like asking if goldilocks was the only person who ever broke into the bear's house and slept in their beds
The type of cellular organism that likely existed first on Earth would've been the prokaryotic cell, because it is the simplest form of like known to man. As far as we know, the steps of the formation of life on Earth went like this (from longest time ago to most recent): Prokaryotic cells, eukaryotic cells, sexual reproduction, multi-cellular life It's also important to note that the Earth is over 4 billion years old, so all of these processes have been going on for a long time.
The only natural satellite the earth has is the moon. Earth's gravity is what keeps the moon from floating away. though in time (not for a long time though) the moon will disappear.
Antarctica
No. Only certain genes are active at the same time. When they are not active, they are turned off.
Because the sun can only shine on one half of the Earth at a time.
No, it is not for only humans. It existed long before humans appeared and will exist long after we are gone; in that time, it has, is and will support hundreds of millions of other types of organism.
No. It causes and eclipse, so it is darker, but not actually night time. Like on Earth, night on the moon is when the a part of the Moon is not facing the Sun. A solar eclipse on Earth, which is caused by the Moon casting a shadow on Earth, causes darkness, but not night time. A solar eclipse can only happen during day time.