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AnnZ [28]
3 years ago
6

This is 7th grade science plz help

Biology
1 answer:
Darya [45]3 years ago
4 0
The best estimate for Earth's age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientist calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years. 
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Erm...
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Most sidewalks are made out of solid concrete sections. There are spaces between the sections. What happens to the spaces during
VladimirAG [237]

Answer:

The options are :

The spaces get wider because the concrete sections shrink.

The spaces stay the same because the concrete sections does not shrink or expand.

The spaces get narrower because the concrete sections expand.

Some spaces get wider, some spaces get narrower, and some spaces stay the same because each concrete section behaves differently on a hot summer day.

The answer is

Some spaces get wider, some spaces get narrower, and some spaces stay the same because each concrete section behaves differently on a hot summer day.

Concrete surfaces react with a change in temperature by either shrinking or expanding depending on the temperature difference.

When there is an increase in temperature it expands a bit and shrinks a bit too when the temperature is decreased.

5 0
3 years ago
A diploid species has 2n=52 chromosomes. If you found a monopsony in a member of this species how many chromosomes would you hav
Lerok [7]
26 as 52/2 =26

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4 0
2 years ago
An analysis of chromosomes in a culture containing mutated cells may show the loss of one or more bases making up the chromosome
ankoles [38]

The answer is; deletion mutation


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