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WARRIOR [948]
3 years ago
10

What are the sub division of pteridophytes?explain it​

Biology
1 answer:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:

Pteridophytes are the "spore bearing vascular plants" and also called as seedless vascular plants belong to the cryptogams. ... Tracheophyta are further divided into four main groups : Psilopsida, Lycopsida, Sphenopsida and Pteropsida.

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In colorectal cancer, some tumor suppressor genes are inactive. This is an important factor resulting in uncontrolled cell divis
tresset_1 [31]

Answer/Explanation:

(1) a mutation in the coding region, resulting in an inactive protein

To check to see if there is a mutation, you could extract the DNA from the cancer cells and then perform PCR to amplify the gene of interest. You could then perform sanger sequencing and compare the sequence to the normal gene to see if a mutation is present. To test the effect of the mutation, you would want to see if an active protein has been formed.

To see if a normal sized protein has been formed, you could perform a western blot, comparing the protein band to the WT protein band. If the protein is absent or much smaller, it is likely not a functional protein.

(2) epigenetic silencing at the promoter of the gene, resulting in reduced transcription.

To check for changes in the epigenetic landscape of the promoter, you could perform chromatin immunoprecipitation by extracting the chromatin from the tumour cells and using antibodies for different chromatin marks to see what has changed between the normal cells and the tumor cells. E.g. H3K9me3, H3K27me3. You would perform a pull down with the antibody of interest and then PCR for your promoter to specifically look at changes at that gene compared to normal cells. To test DNA methylation, you could perform bisulfite sequencing.

To see how transcription is affected, you could extract RNA from the tumor and normal cells, and compare the levels of RNA between the two samples by qRT-PCR

3 0
3 years ago
This is a negative charge. On the left draw the type of charge that would move away from it. On the right, draw the
Lapatulllka [165]

Answer:

On the left is negative charge while on the right is positive charge.

Explanation:

On the left, there should be negative charge that will move away due to repulsion force because both charges are same so they move away from one another while on the other hand, on the right side there should be positive charge which will move towards it because both charges are opposite to each other so they attract each other.

5 0
3 years ago
1.Where should Species C be placed on the tree?
Nitella [24]
1. Space 2
2. Back limb
3. The back limb helps because you can see the shape it was growing into and the tail because two have tails and the others don’t.
7 0
3 years ago
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Budding produces small projections from one parent which split off to form offspring.
anyanavicka [17]
True, budding produces small projections from one parent which split off to form offspring.
3 0
2 years ago
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What's a energy pyramid
Sav [38]

Answer:

it's the way energy moves up through the trophic levels. the higher the level you are the less energy there is.

Explanation:

6 0
3 years ago
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