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Scrat [10]
3 years ago
7

What is about true about these atoms calcium, gold,argon,iodine

Biology
1 answer:
UNO [17]3 years ago
6 0

Answer:

In moon rock sample the ratio of the number of stable argon-40 atoms present to the number of radioactive potassium−40 atoms is 7:1. Assume that all the argon atoms were produced by the decay of potassium atoms, with a half-life of 2.5×10^9yr. The age of the rock is

Explanation:

Hope this helps :)

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A cell under a microscope shows Two daughter cells were formed and they are haploid. Which stage of meiosis is the cell showing?
Nadya [2.5K]

The answer is <span>Meiosis I.</span>



<span>Meiosis is a cell division which results in the reduction of chromosome number by half - from diploid to haploid - in daughter cells. It consists of meiosis I and meiosis II. Meiosis I produces two haploid cells. Meiosis II is analogous to mitosis, so each of these two haploid cells will in meiosis II produce two haploid cells. In total, meiosis results in four haploid cells.</span>

<span>
</span>

<span>Therefore, the production of two haploid daughter cells is in meiosis I.</span>

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A scientist isolates mRNA from the cytoplasm of some mouse cells. She separately isolates the DNA from mouse cells and heats the
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Answer:

Answer is explained below.

Explanation:

A. The  observed  single  stranded  regions  are  found  in  the  mRNA.

B. The  loops  represent  introns  (Non-coding  portions  of  the  mRNAin primary  transcript ).  The  intron  sequences  are  removed  to  form  a mature mRNA  by  splicing.

C. If  the  scientist  use  RNA  and  DNA  from  bacteria,  loops  cannot be seen. Because introns are produced in only eukaryotes but not in prokaryotes.

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Explanation:

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