When alzheimer disease sets in early and impacts those under age 60, the final phase of the disease or death typically occurs around 3 to 5 years after the first signs of the disease appear. Alzheimer's disease is the most common type of dementia, which is represents the memory loss and other cognitive abilities serious enough to interfere with normal life. Alzheimer accounts for about 60 to 80 percent of dementia cases.
Blue photons drive the photosynthetic reaction, although from an energy standpoint, one might consider them less efficient than green or red photons because their high energy isn't fully utilized; some of the energy is essentially lost compared to photosynthetic photons with a longer (less energetic) wavelength.
Answer:
C) decreased functional reserve
Explanation:
Ageing is a biological process which leads to the loss of function of the tissue and cells of the organism.
The biological ageing is determined genetically and can be correlated with the chronological ageing. The ageing is also influenced by the environmental factors which could interfere with the physiology, anatomy and morphology of the organisms.
The cell division cycle gets arrested to prevent the proliferation of these damaged cells and to remove the harmful factors from the body. This leads to the loss of function of the cells and tissues.
Thus, Option-C is the correct answer.
