Answer:
This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.
hope this helps :)
Answer:
<u>B</u>
Explanation:
If a disease wiped out the hare population, then result would be :
<u>The </u><u>arctic fox</u><u> population could </u><u>decrease</u><u> because they would </u><u>lose</u><u> a </u><u>food source</u><u>.</u>
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It cannot be A because although the arctic fox population might decrease, it would only cause an increase in its prey's population as there are less predators (arctic fox) to consume it.
Pollution; waste and discharge falls into the water, polluting the sea grass. It reduces the amount of sunlight and the plant might die.
Poor land management; trees lead to the erosion of dirt, making the soil cloud up the water, not giving the sea grass sunlight.
Careless behavior; from people stepping onto the sea grass, to other items falling and smothering the sea grass.
(Come up with one more on your own. c: )
Vaccines are made up of dead or weakened pathogens that are stripped of their ability ..
so answer is in a vaccine