White-collar workers were introduced into the realm of modern social science at the end of the nineteenth century. The starting point was twofold: (1) the notion of a growing number of occupations, employments, and functions that shared many traits of the working class while at the same time differing in important aspects from manual workers as well as from the higher social strata; and (2) the exceptional rapid growth of these categories in the decades around the turn of the century, which even outdid that of the manual workers.
Answer:
I think its e
Explanation:
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants
A, C & D
Usually as cells, and even organisms get larger, their surface area to volume ratio decreases. This is why it is important for cells to retain their relatively small size to keep a larger surface area to volume ratio.
Explanation:
A larger Surface area to volume ratio ensures that the cell can efecitnyl take up nutrients and excrete toxic metabolites. This ensures that the biochemical activities in the ell continue effectively to support the life process.
If cells were too large, it would take time for important substances like nutrients and oxygen to reach the center of the cell. On the other hand, toxic metabolites would accumulate in the cells because the rate at which they are eliminated is very low.
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Well Sertoli cells<span> keep the germ </span>cells<span> that start the process healthy and nourished. </span>