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Stells [14]
3 years ago
11

A fossil is found to have a 14c level of 67.0% compared to living organisms. how old is the fossil?

Biology
1 answer:
sp2606 [1]3 years ago
3 0
The half-life  of carbon-14 is equal to 5730 years. The amount of substance with half-life h at any time t is equal to,
                       At = (Ao) x (1 - 0.5)^(t/h)
Substituting, 
                    At/Ao = 0.67 = 0.5^(t/5730)
The value of t from the equation is 3310.6 years. 
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3 years ago
11.   Which of the following accurately describes a step within transcription?      A. The RNA strand forms a template by which
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3 years ago
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Answer:

1: minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells

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3 0
2 years ago
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g In humans, a widow's peak hairline is dominant while a straight hairline is recessive. Tom and Sue both have a widow's peak bu
Sholpan [36]

Answer:

3/4

Explanation:

In humans, a widow's peak hairline is dominant while a straight hairline is recessive.

Tom and Sue both have a widow's peak but their son Joe has a straight hairline.

For Joe to have a straight haircut which is inherited in the recessive condition, that means both parent each has a recessive allele copy for this trailer making them heterozygotes for the trait.

If the widow's peak allele is W (genotype for heterozygote would be Ww)

A cross between these two heterozygotes gives

Ww x Ww

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3/4 widow's peak 1/4 straight hair line

The genetic probability of that child having a widow's peak hairline is 3/4...

3 0
3 years ago
Can anyone answer this??
Mekhanik [1.2K]
Solutions:

1- chemical reaction.

2- reactant.

3- product.

4- nonpolar covalent bonds.

5- hydrogen bonds.

6- equal to.



Hope it helped,


BioTeacher101


(If you have any questions feel free to ask them in the comments)
5 0
2 years ago
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