If Earth had no deserts, there might be more suitable space for farmland. The current desert animals wouldn't have evolved, but the area would probably be more hospitable to life in general.
There would be no life on Earth
there will not be water tides
Yes, life would be possible on an Earth with a different tilt to its axis, as long as the different was not massive. For example, if the axis of rotation was parallel to the orbital plane, conditions would be very different and life, if it developed would also likely be very different than life as we now know it.
The earth would be flat, and probably devoid of life.
help
No oxygen will be produced. So life will be anaerobic
Life on Earth has evolved to cope with the environment of earth. If the gravity were different it is very likely that life would look very different. It is likely that if the gravity differed by a large amount then life would not have evolved at all. Too heavy and Earth would have enormous amounts of hydrogen and would be a small gas giant. Too little and the earth could not keep hold of much of its atmosphere. As a result we would have far less CO2 and the surface would be much colder. Also we would loose our precious ozone layer and the surface would be bathed in solar radiation.
Without Earth's revolution, there would be no changing of seasons as the tilt of Earth's axis creates the different seasons. Additionally, the length of a day would not have a fixed basis as it is influenced by the rotation and revolution of the Earth.
No, it doesn't help the Earth. It only protects all the DNA-based life on its surface and in the air above it. The planet itself is not helped by whether or not life is present. If there was no life on Earth, it would be very different. Would the Earth be better off with no life? I don't think so!
One - one side of Earth would be in constant daylight, while the other side would be in constant darkness. Two - life as we know it, would not exist.
One - one side of Earth would be in constant daylight, while the other side would be in constant darkness. Two - life as we know it, would not exist.
Almost certainly not; the odds against it would be staggering. Life on Earth is the end result of billions of years of evolution driven by unique factors and random chance. IF there is life elsewhere (assumed, but there is no evidence) then it would have evolved under different circumstances and through a different pattern of mutations. It will be different - probably MUCH different. We may not recognize it as "life".