I'm assuming you meant "What scientists study all forms of life?" The answer is biologists (the root word "bio" means "life").
All you need for life forms (most simple forms) is amino acids. They have actually been created by scientists.
Plants require sunlight to grow. Other forms of life eat plants.
Biodiversity ; Gradpoint .
A microbiologist studies microscopic forms of life.
But isn't that what you're suppose to tell me eh?! he-he
If there is any alien life it could be cellular life forms, virus like life forms or human like life forms because scientists have already proved that those are the only life forms that could live in outer space.
DNA I think
Scientists often look for the molecule water when investigating the possibility of life on other planets. Water is essential for all known forms of life and its presence can indicate the potential for habitability on other planets.
Life has been found just about anywhere on Earth.
all life forms have cells
all life-forms are located in the biosphere
Xenobiology is the speculative Biology of extraterrestrial life forms.