Answer:
Local effects of volcanic eruptions
Explanation:
Lava flows, volcanic landslides, mudflows, and ash flows (nuees ardentes) generally result in total obliteration of any ecosystem in their path. ... Volcanic ash weathers rapidly and releases plant nutrients.
Answer:
Explanation:
Reactants
Solid 'iron'III'oxide' = Fe₂O₃
'carbon'monoxide'gas' = CO
Product
'iron'metal' = Fe
carbon'dioxide'gas = CO₂
Now
Fe₂O₃
+ 3CO
→ 2Fe + 3CO₂
The reactants are positioned at the left hand side of the equation.
The products are at the right hand side
s = solids
g = gases
This type of natural selection is referred to as directional selection. In this type of natural selection, either one phenotype is preferred or the other; therefore, there is no equilibrium between the populations of the phenotypes that are present.
Examples of organisms that have undergone directional selection are black bears during the ice ages, African chichlid and sockey salmon.
Answer: It is necessary for the immune system to clearly distinguish foreign cells and proteins from those made by the body so that the immune system will be able to fight foreign cells and proteins and eliminate them from the body.
Explanation: The ability of the immune system to clearly distinguish foreign cells and proteins from those made by the body helps the body to identify pathogens that invade the body and trigger appropriate immune response to eliminate the foreign cells and proteins.
When the immune system of the body fails to distinguish foreign cells and proteins from those made by the body, the body launches an attack against its cells, that is the immune system triggers an autoimmune response in which attacks are launched against the cells of the body and destroy them. This condition in which the immune system recognizes the cells of the body as non-self and launches an attack against them is known as autoimmunity. Autoimmunity is the major cause of most degenerative diseases such as type I diabetes mellitus.
