Calcium is the answer to complete to form calcite
The correct answer is: d) begins later in life
Eggs or female reproductive cells are formed well before birth in a huge number (primordial oocytes). But, the number of oocyte decreases after birth constantly (there are 2 million oocytes at birth and 40,000 of them in puberty). At menopause, no egg cells are left.
On the other hand, the first sperms are formed only from puberty, but the production of those cells never stops.
They're found orbiting around outside the nucleus, because they're electrons
I hoped this helped! :)
Answer:that means there's a short distance between places with different elevations
Explanation:basically when the contours are closer that means that the slope is steep. The contour intervals tell the vertical distance between each line by counting the number of contours of neighboring lines and multiplying it with contour intervals we can calculate the elevation of any line