Beavers are descendants of land-dwelling rodents similar to rats. The beavers however have adapted their body shape to live in water bodies like ponds and lakes. This can be hypothesised by saying that the early rodents or the ancestors of beavers were forced to find food in the waters. They lacked the flat tail and the webbed feet. With time the need to increase their ability to catch fishes and floating insects, the rodents with flatter tail and a bigger flat webbed feet gradually evolved. The rodents with flatter tails and webbed feet became adjusted to the life on water and became the modern day beavers.
Answer:
The amount of matter in a system stays constant, it is not created nor destroyed.
Explanation:
For example, in a situation such as a chemical reaction, the atoms of the molecules never magically appear or vanish. The atoms of the reactants are simply rearranged into a product. Hope this helps.
<h2>Multiple sclerosis</h2>
Explanation:
- Brittany has experienced progressively increasing difficulty moving, speaking, and swallowing due to the deterioration of the myelin sheaths within her nervous system. Brittany most clearly suffers from <u>Multiple sclerosis.</u>
Multiple slerosis is a autoimmune disease in which a person's immune system responds against its own Central Nervous System (CNS). The immune response destroys the myelin sheath of the nerves.
As a result, the transmission of nerve impulse is disrupted. Damage to the nervous tissue is the cause of many neurological symptoms like speaking difficulty, loss of control on voluntary muscle etc. As a whole in multiple sclerosis the patient's brain loses control on his body.
