no
animals have a brain even dinosaurs do
Animals like humans have a brain, why should they have any other living thing? Please clarify what your question is.
No, not every animal needs a brain. A jellyfish does not have a brain, it barely has any organs.
There are not any animals where their brain is not in their head. There is an insect, the spider, whose brains spill into their legs.
brain brain brain
The brain has two kinds of cells, neurons and glial cells. So if the brain did not have neurons it could still have glial cells, but they have no function in the absence of neurons. You would, in effect, have converted the brain into a tumor. Human beings cannot live without a brain. (Nor any irrational animals) We wouldn't be animals, we would be stupid zombies.
Both animals and humans do have reward centers in the brain. Both humans and animals feel happy or pleasure when the reward centers of the brain are stimulated.
Not for a long time. It's been attempted in animals for years - still not working.
Except the working of brain no activity is different from animals of humans. That is because even humans are animals & yet there is no other way to live on this earth.
cockroaches
no
My brain lets me speak and form sentences.
Some animals, such as those in the genus Hydra, don't actually have a brain per se, making it difficult to answer.