Answer:
Cells reproduce for repairing tissues and the growth and development of an organism. Cell division is necessary for any organism to grow and, once fully developed, to maintain healthy tissues. Mitosis occurs in a fully formed organism to repair damaged tissue and to replace old cells.
289.4 F is the right one man
Answer:
nocturnal penile tumescene
Explanation:
is a spontaneous erection of penis during sleep or when waking up.
In
this case, we can simply use a ruler to measure the heights of the signal. Use the
same ruler all throughout to reduce deviations in the measurement.
So
for example we have 3 isotopes, so we get 3 signals with heights of (for
example):
isotope
1 = 62
isotope
2 = 2
isotope
3 = 8
Therefore
the mass of the signals would be:
62
+ 2 + 8 = 72
The
fractional abundance of each isotope would be:
frac
isotope 1 = 62/72 = 0.86
frac
isotope 2 = 2/72 = 0.03
<span>frac
isotope 3 = 8/72 = 0.11</span>