If you mean do people evolve from monkeys or other animals, the answer is NO. However, people a hundred years ago were shorter and unhealthy. Due to better diets, hospitals, and knowledge of germs and diseases, (NOT evolution) we are WAY healthier.
Answer:
Of course we can. As a simple demonstration of that fact that you can have a milk shake or cheese sandwich is due to evolution.
People evolve in response to stresses on the species. Those who can't survive don't live to pass their ability on to their descendants. This is the basis of evolution. A recent example is the ability of some humans to digest milk while others cannot do this. This was in response to a need to use an available food source (cow's milk) during some lean period in our history. Those people alive at that time couldn't make use of this food, those with the necessary mutation could. We survived the others starved. In some areas (such as Asia) the need for this alternate food did not arise and the mutation never became widespread as it offered no advantage.
The ability to digest milk in adulthood, conferred by genetic changes occurred as recently as 3,000 years ago. Interestingly enough it happened independently in both Europe and Africa due to similar pressures.
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No.
Humans evolved from an early hominid/hominin - which is also the common ancestor of various apes, monkeys and other primates - which itself evolved from smaller mammals, likely resembling modern lemurs and similar animals.
Birds evolved from early reptiles (theropod dinosaus, to be precise) beginning around the time of the Jurassic.
The last common ancestor of both birds and humans was approximately 300 million years ago (possibly earlier). It was niether a mammal nor a bird, but instead a mammal-like reptile.
Although lizards have been around for a very long time (probably since the time of the dinosaurs) they most likely are evolved from a legless reptile, e.g a snake.