Answer:
Mutations can also be caused by exposure to specific chemicals or radiation.
Explanation:
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I think that a toxin that was introduced into a food web can kill some species but not others because some may have resistances to the toxin, while others, it may be lethal. Also that it did not affect everyone because as Bioaccumulation has stated if affected one organism but their might not be much biomagnification as in much increase in the correlation between the food chains in that area. i think the cat were like the top animal so the key stone animal of the food chain and also it had no predators.
Answer:Prothrombin is transformed into thrombin by a clotting factor known as factor X or prothrombinase; thrombin then acts to transform fibrinogen, also present in plasma, into fibrin, which, in combination with platelets from the blood, forms a clot (a process called coagulation).
Explanation:
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Which of the following is true about Earth's freshwater, air, soil and trees?
A. Although these resources are renewable, their present benefits can be reduced if used carelessly.
<u> B. Although these resources are renewable, they present very few benefits for humans</u>.
C. These resources are nonrenewable, so humans must stop using them if they are to survive.
D. Although these resources are nonrenewable, humans don't have to worry about conserving them
Answer:
same way a group of similar cells make a tissue, a group a students/ pupils make a class...
