Why does secondary succession occur much quicker than primary succession

1 answer:

7 0

It is usually faster than primary succession as: soil is already present so there is no need for pioneer species. Seeds, roots, and vegetative organs of plants may still survive in the soil.

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Anyone please banned my account

zmey [24]

Answer:

you go to settings and tap on log out option to exit this account

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3 years ago

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Water supplies are treated with chlorine to kill pathogens. chlorine reacts well with many other chemicals and bacterial cells b

expeople1 [14]

Answer:

Legionella tends to form biofilms and infect other microbial cells as intracellular pathogens.

Explanation:

The Legionella genus of the bacteria is a group of gram-negative bacteria that can cause legionnaires disease.

The<em> Legionella pneumophila</em> is a species of this genus which can cause legion pneumonia. The bacteria lives in the freshwater and is resistant to chemical treatment like chlorine and the biocide treatment.

The reason for this resistance is since this species form a polysaccharide layer around the colony of the bacteria which is resistant to these treatments and also the bacteria prove parasitic to the protozoans which feed on these bacteria.

Thus, the selected option is the correct answer.

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4 years ago

Witch part of the cell does this illusion represent?

Anettt [7]

Answer: I believe it's the mitochondria!

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3 years ago

A pair of genes that control a trait is referred to as?

scoundrel [369]

A pair of genes that control a trait is referred to as an allele.

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3 years ago

Restriction enzymes are used in making recombinant DNA. Describe the role restriction enzymes perform when constructing recombin

Andrei [34K]

Hi,

Recombinant DNA technology is the process in which a target gene of interest is replicated by inserting it into a vector and creating a recombinant DNA. This recombinant DNA is then returned into an expression system where it is replicated several times to give rise to multiple copies of our desired gene or that gene product.

One of the very important role for the execution of this technology is performed by Restriction endonuclease enzymes. These are the enzymes that have ability to cut the DNA fragment at specific sequence into fragments of different lengths called restriction fragments.

They play a very important role in recombinant DNA technology:
They can map the location of specific restriction sites where the target sequence is identified and cleaved.
They cut down the DNA at specific sites called restriction sites. The host DNA in which foreign gene or target gene is inserted is also cut with the same restriction enzymes. So in the recombinant DNA technology, restriction enzymes act like a molecular scissor which identify and cut certain DNA sequences as per or requirement.
The target sequence can be cut from multiple places by restriction enzymes since our target sequence can be present multiple times in the DNA of organism.
When restriction enzymes cut the DNA, they leave sticky or blunt ends at that site in such a way that these ends are able to bind with the complementary bases of vector DNA when introduced.
Then another enzyme DNA ligase seals the ends of target DNA and vector DNA making a whole recombinant DNA that is ready to be cloned and progress further steps of recombinant DNA technology.

<em>You can see attached image for better understanding.</em>

Hope it help!

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3 years ago