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TEA [102]
2 years ago
10

What has caused a large amount of desertification in tropical areas?

Biology
1 answer:
ziro4ka [17]2 years ago
5 0

Answer:

i think over irrigation is the answer

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All of the following are differences in transcription, RNA processing, and translation between prokaryotes and eukaryotes except
Mazyrski [523]

Answer:

the mRNA goes through extensive modifications such as addition of a poly tail and a 5' cap in eukaryotes but not in prokaryotes.

Differences:

- the promoters in prokaryotes have a -35 and -10 box while in eukaryotes they are variable but have a TATA box from  

- the transcription initiation site there is a single RNA polymerase in prokaryotes while eukaryotes have multiple RNA polymerases

- the sigma factor associates with the promoter region in prokaryotes but in eukaryotes there are many basal transcription factors

Explanation:

Ribosomal and transfer RNAs are processed both in prokaryotic and eukaryotic organisms. However, mRNA is only processed in eukaryotes. In eukaryotic cells, mRNA processing involves:

1. Capping at the 5' end. This process has several functions including regulation of nuclear export, prevention of eukaryotic mRNA degradation and promotion of translation.

2. Splicing in order to remove introns and conserve coding exons. Splicing helps to increase the diversity of the eukaryotic mRNAs (and therefore eukaryotic proteins)

3. Polyadenylation by the addition of a poly(A) tail at the 3' end. The poly(A) tail makes the eukaryotic mRNA molecule more stable and also prevents its degradation by exonucleases.

8 0
3 years ago
Which is an example of a heterogeneous catalyst?
irakobra [83]
<span>amylase is an example of an enzyme</span>

In biochemical reactions, it is mostly triggered by enzymes. Enzymes are important components in the process that involves metabolism and digestive functions, further, most of these enzymes are proteins.Proteins are biological macromolecule and mostly composed of enzymes. Proteins play a role in the physical make-up of a cell or acts as a cytoskeleton –maintains cell shape and figure. These proteins plays different roles and works with nucleic acids and other macromolecules in the cells including cell cycle, cell adhesion, immune response and cell indicators.  
5 0
4 years ago
Toxoplasma is a parasite that lives in what?
Kaylis [27]
The parasite can live<span> in the environment for many months and contaminate soil, water, fruits and vegetables, sandboxes, grass where animals graze for food, litter boxes, or any place where an infected cat may have defecated. </span>Toxoplasmosis<span> is an infection caused by a microscopic parasite called </span>Toxoplasma<span> gondii.</span>
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3 years ago
What do inner planets and outer planets have in common, and what are some differences?
podryga [215]

Answer:

Inner Planets include Mercury, Venus, Earth and Mars,- these are hotter planets.

Outer planets are colder because they are farther from the sun, a lot farther.  

Explanation:

They are all planets.

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3 years ago
Nephrons located close to the medulla with long nephron loops are called ________ nephrons.
soldi70 [24.7K]

Answer:

The answer is juxtamedullary nephrons. Hope this helps.

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3 years ago
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