The answer is invasive species.
Invasive species are species that are not native to specific ecosystem,
but they have a capability to spread widely through the ecosystem, This way
they can threaten native species of the ecosystem or cause
environmental harm.
<span>After being introduced into the Black Sea, they greatly affect local
ecosystem. In the new area, they have no natural predators and are able to
spread. If they spread beyond the area they are introduced, they
become invasive species which can overgrow native biotopes and are
a great threat to the local biodiversity. This could lead to the extinction
of some native species.</span>
The vector that would be the
best choice for cystic fibrosis gene therapy is adeno-associated virus for it
has valuable reasons. First, it is huge enough to carry the gene, second, it
will infect the right type of tissue, third, it will not cause an immune
response and lastly, it infects the particular cells that divide irregularly. Therefore,
this vector will definitely treat cystic fibrosis for it can target affected
cells, which is a great help in the normal functioning of an organ.
<span>The correct answer is a lizard. The prefix "hydro-" means water, so the hydrosphere means the parts of the earth covered in water, such as oceans, lakes, etc. The prefix "litho-" means stone or rock, so the lithosphere indicates the land on the earth. An animal who lives in both the hydrosphere and lithosphere will likely be an amphibian (such as frogs and lizards), which lives both on land and in water. An eagle is incorrect because it does not live in water. A duck is incorrect because, although it often visits the water, it does not live there (it's a mammal like us). A shark is incorrect because it does not live on land.</span>
