During middle age, the ability to hear higher-pitched sounds declines first.
Presbycusis is the aging-hearing loss that occurs as a result of the aging process. It is a slow process that affects botrh ears equally thus difficult to notice, the first signs is the inability to understand speech in noisy environments and high frequency sounds.
Answer:
The question is not clear so let me explain about the diffusion of water.
Explanation:
Osmosis can be described as the diffusion of water molecules from an area of lower solute to an area of higher solute. In osmosis the molecules of water move along a concentration gradient hence, it is a passive transport. No energy is required for this process to occur.
For example, consider a solution which has a cell which is high in solutes. The water will move into the cell by osmosis and the solutes will move out of the cell.
Genetic codes contain complex information and detailed instruction
In the year 1850, Rudolf Virchow was studying cells under a microscope, when he observed that cells were dividing and forming new cells. Realizing what he had observed, he understood that living cells reproduce new cells through division. Basing on his conclusion and realization, Virchow proposed that living cells came only from the other living cells.
Answer:
b. Restriction enzymes cutting DNA
Explanation:
Restriction enzymes are the enzymes that cut the DNA molecules. Their specific feature is that they digest the specific DNA sequences only. These specific DNA sequences are called restriction sites. When some restriction enzymes digest the DNA, DNA fragments with single-stranded ends are produced. These single-stranded overhangs are called sticky ends. They are called so since the DNA fragments produced by digesting DNA with one restriction enzyme have complementary overhangs that spontaneously base pair.
