Answer: It's C
Explanation: because They also do not have a brain, respiratory system, or circulatory system.
1. Prokaryotic cells 2. Eukaryotic cells
Chitin ....................
Answer:
24555 years
Explanation:
Data provided in the question:
Half life of carbon 14 = 5700 years
carbon present in the dead man = 5% of the original amount of carbon 14
Now,
let the initial Amount of carbon be 'A'
Therefore,
after half life
Amount of carbon = ![\frac{A}{2}](https://tex.z-dn.net/?f=%5Cfrac%7BA%7D%7B2%7D)
Thus,
= ![Ae^{kt}](https://tex.z-dn.net/?f=Ae%5E%7Bkt%7D)
here,
k is the decay constant
t is the time = 5700 years
therefore,
1 = ![2e^{k\times5700}](https://tex.z-dn.net/?f=2e%5E%7Bk%5Ctimes5700%7D)
or
0.5 = ![e^{k\times5700}](https://tex.z-dn.net/?f=e%5E%7Bk%5Ctimes5700%7D)
taking natural log both the sides
-0.69314 = 5700k
or
k = - 0.000122
therefore,
for dead man Amount of carbon = 5% of A = 0.05A
thus,
0.05A = ![Ae^{( - 0.000122)t}](https://tex.z-dn.net/?f=Ae%5E%7B%28%20-%200.000122%29t%7D)
or
0.05 = ![e^{( - 0.000122)t}](https://tex.z-dn.net/?f=e%5E%7B%28%20-%200.000122%29t%7D)
taking natural log both the sides
we get
-2.995 = - 0.000122 × t
or
t = 24555.18 ≈ 24555 years