Answer:
Igneous rocks like pumice have holes because the maga/lava cools quickly, trapping air and gas bubbles inside.
Explanation:
Hope this helps u :D
He did this by experiment with anthrax. Using a microscope, Koch analysed the blood of cows that had failed of anthrax. He marked rod-shaped bacteria and supposed they caused anthrax.
<h3>What does anthrax do to a human?</h3>
Anthrax induces skin, lung, and bowel disease and can be fatal. Anthrax is analysed using bacterial cultures from infected tissues.
There are 04 kinds of anthrax: cutaneous, inhalation, gastrointestinal, and injection.
Anthrax is cured by antibiotics.
Thus, He kept rod-shaped bacteria and supposed they caused anthrax.
To learn more about anthrax click here:
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Answer:
Universe
Explanation:
This should go to physics category
The big bang theory is derived from the observed universe, and the microwave background signal that arrived to earth...
Answer:
A. CRISPR sequences in bacteria resemble those from bacteriophage and plasmid DNA. (The CRISPR sequences are derived from previously invading bacteriophages and pladmids.)
B. For reverse genetic studies, CRISPR /CAS can be used to replace wild type alleles with mutant alleles which can knock out the function of target genes. (CAS 9 introduces double strand break (DSB) in the target sequence which is then repaired by non homologous end joining (NHEJ). NHEJ causes deletion, insertion or frame shift mutation leading to knock out of the target genes.)
C. CRISPR is a bacterial sequence in the bacterial chromosome. ( The sequences are derived from bacteriophages that had infected the bacteria defore.)
D. The guide RNA guides CAS to specific DNA sequences. ( The guide RNA directs CAS nuclease to the target sequences for editing.)
E. The CRISPR/CAS system was discovered in bacteria, and it's natural function is the equivalent of an immune system in bacteria for remembering viral infections and for attacking viral DNA in future infections. (The CRISPR/CAS system provides acquired immunity to bacteria.)
Explanation:
see answer
The reason why animals need continuous supply of oxygen is to survive. Almost all of the animals rely on the oxygen in order to be able to survive and function properly.
The oxygen is what enables the respiration, and the respiration is what allows for the cells to be alive and be able to function. Without constant oxygen supply, the cells will not be able to function, thus they will die, which will cause the whole organism to die.
Also, the oxygen is a gas that is used for the burning of glucose into fuel. This basically means that the oxygen is the final detail that enables the organism to obtain nutrients. If the oxygen is not present, than the organism will do everything to create glucose and it will manage to, but it will not be able to turn into a fuel for itself, thus it will not be usable.
