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dexar [7]
3 years ago
8

Most of the rocks we study were formed in what era?

Biology
1 answer:
Whitepunk [10]3 years ago
5 0

Answer: Paleozoic

Explanation:

Not as many rocks existed from the precambrian era

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The only one correct answer would be:

c. Yellow or red hues in the soil indicate the presence of iron or aluminum. 
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On your own notebook paper write a four sentence summary of the most important ideas on each section.
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For gas exchange to be efficient, the respiratory membrane must be ________.
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<span>The correct answer is b.0.5 to 1 micrometre thick.</span>
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In a hypothetical population of plants, flower color is determined by a single gene with two alleles. In a population of 500 pla
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Answer:

In the F1 generation

RR = 0%

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rr = 50% (or 0.5)

Explanation:

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A punnet square of the cross is shown.

The resulting punnet square shows that only Rr and rr genotypes are possible, at a ratio of 50:50 (or 1:1). Therefore, the genotype frequency of Rr is 50%, and rr is 50% in the F1 generation. This can also be written as 0.5. It is not possible to get a red plant, as the genotype RR can not come from this cross

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