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Viktor [21]
3 years ago
10

What extends from inside Earth's crust to the lower atmosphere

Biology
1 answer:
swat323 years ago
4 0
TROPOSPHERE is the anwser 
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During elongation, a charged trna first enters the ribosomal ________ site and then moves into the ________ site.
anygoal [31]
3 sites in a ribosome:

The charged tRNA first enters the ribosomal A site...then moves to the P site and finally to the E site.

Because they only ask for 2 I would say A then P.
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3 years ago
What are alleles?<br> different genes<br> same genes<br> different types of a genes
krok68 [10]

Answer:

Different types of genes

Explanation:

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3 years ago
I need this done quick guys thanks you
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A certain eukaryotic organism has multiple, distinct genes with highly similar sequences that are expressed at different times i
vlabodo [156]

These genes could have arisen by gene duplication.

<h3>What is gene duplication?</h3>

Gene duplication is the process of copying a section of DNA that codes for a gene. A retro transposition event or a recombination mistake are both potential causes of gene duplication. As a result, the duplicate gene coding may experience a significant number of modifications throughout time. This might prevent the gene from functioning or, in other situations, give the creature a benefit.

Gene duplication is a phenomenon that can happen through a variety of ways:

  • Ectopic Recombination: Uneven crossing-over between misaligned homologous chromosomes during meiosis might result in duplications. A duplication at the exchange site and a reciprocal deletion are the results of this recombination.
  • Replication Slippage: Short genomic sequences can be duplicated as a result of the replication error known as replication slippage. DNA polymerase starts copying the DNA during replication, but eventually the polymerase separates from the DNA, causing replication to stall. The replicating strand is incorrectly aligned when the polymerase reattaches to the DNA strand, which accidentally results in several copies of the same portion.
  • Aneuploidy: When a single chromosome's nondisjunction causes an abnormally high number of chromosomes, this condition is known as aneuploidy. Aneuploidy is frequently damaging and frequently causes spontaneous miscarriages in mammals. Some aneuploid people can survive. For instance, human trisomy 21 causes Down syndrome but is not lethal.

Learn more about gene duplication here:

brainly.com/question/14014915

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2 years ago
Which could describe the properties of sedimentary rock?
Rashid [163]

Answer:

D. Rounded grains cemented together by dissolved mineral.

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3 years ago
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