Why is there a need for humans to eat a balanced diet?

A balanced diet supplies the nutrients your body needs to work effectively. Without balanced nutrition, your body is more prone to disease, infection, fatigue, and low performance. Children who don’t get enough healthy foods may face growth and developmental problems, poor academic performance, and frequent infections.

Why did the diet of early humans change?

The first major evolutionary change in the human diet was the incorporation of meat and marrow from large animals, which occurred by at least 2.6 million years ago.

Why don t animals need a balanced diet?

A nutritionally balanced diet is necessary to maintain good health and meet the biological requirements of an animal. Poor provision of food can cause an animal to experience compromised physical health which can lead to poor mental well-being.

Why did humans become meat eaters?

When humans began adding meat to their diet, there was less of a need for a long digestive tract equipped for processing lots of plant matter. Slowly, over hundreds of thousands of years, the human gut shrunk. This freed up energy to be spent on the brain, which grew explosively in size.

How did early humans obtain food explain?

Early humans would have obtained food through a number of ways, such as gathering, hunting, scavenging and fishing. Increasingly, it is being suggested that the early hominids scavenged or foraged* for meat and marrow from the carcasses of animals that had died naturally or had been killed by other predators.

Do animals also need a balanced diet yes or no?

A healthy diet gives the animals energy and helps them to recover from illness. Gorillas are vegetarian and eat a large variety of fruit and vegetables. Chestnut is a six-month-old penguin who has been hand-reared. He eats 20 – 30 fish each day and is very hungry and demanding.

Do animals eat a balanced diet justify your answer?

Answer: Yes, animal food also consists of different components. They also need a balanced diet for better growth and maintenance of a healthy body.

How did humans evolve to only eat meat?

Throughout human evolution we became more and more equipped to eat meat and less and less equipped to eat plants. We evolved from a pure plant-eating heritage, and gradually evolved to supplement that plant-based diet with meat, which eventually led to complete dependence on meat for survival.

How do humans get enough nutrients from animals?

Thus, these animals manage to get a decent intake of key nutrients by way of eating the innards of their prey. Humans, on other hand, generally prefer eating only the meat (i.e., the muscle tissue) of animals, which is not nearly as rich in nutrients as their inner organs.

How did humans evolve to have smaller guts?

The Evolution of Diet. Digesting a higher quality diet and less bulky plant fiber would have allowed these humans to have much smaller guts. The energy freed up as a result of smaller guts could be used by the greedy brain, according to Leslie Aiello, who first proposed the idea with paleoanthropologist Peter Wheeler.

How did our stomachs evolve through natural selection?

Although we weren’t great killers in the early get-go our stomachs evolved through natural selection to do pathogen fighting for us. Our stomachs became very acidic. The acid in our stomachs killed off pathogens that resided in the rotting animals we scavenged and it also enabled improved digestion of meat.