The type of membrane that protects internal organs from friction is a membrane.

Solution:

The type of membrane that protects internal organs from friction is known as serous membrane.

It is the transparent liquid that is found in the body cavities. When looking for a direct location, it is mostly found in the heart, lung, and abdominal cavity. Serous fluid acts as a lubricant for organs. By lying within the membrane near the organ, it helps the organ move easily for functioning and reduces stress and friction the organ may have against other organs. The lungs, for example, constantly move to provide air for the body. This fluid allows for this motion and prevents the wear and tear that might occur without serous fluid.

Although serous fluid is important for lubrication, it also can be very harmful to the body. Some diseases cause the serous glands to produce too much serous fluid. As a result is that the membranes that hold the serous fluids are not allowing the organ to move or function properly. This could not only be serious for our lungs but also for our heart that needs to move to supply blood to the body.  

This is the required answer.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.