Answer: hope this helps
Explanation: A single-replacement reaction is a reaction in which one element replaces a similar element in a compound. The general form of a single-replacement (also called single-displacement) reaction is:
A+BC \rightarrow AC+B
In this general reaction, element Ais a metal and replaces element B, also a metal, in the compound. When the element that is doing the replacing is a nonmetal, it must replace another nonmetal in a compound, and the general equation becomes:
Y+XZ \rightarrow XY+Z
Yis a nonmetal and replaces the nonmetal Zin the compound with X.
Metal Replacement
Magnesium is a more reactive metal than copper. When a strip of magnesium metal is placed in an aqueous solution of copper(II) nitrate, it replaces the copper. The products of the reaction are aqueous magnesium nitrate and solid copper metal.
\text{Mg}(s)+\text{Cu(NO}_3)_2(aq) \rightarrow \text{Mg(NO}_3)_2 (aq) + \text{Cu}(s)
This subcategory of single-replacement reactions is called a metal replacement reaction because it is a metal that is being replaced (copper).
Answer:
It only records trends in population at fixed locations in the ecosystem.
Explanation:
The point count method is a method used to monitor the populaton of birds in certain places that consists on having someone fixed at one spot and record all the birds that he can spot by sight and by ear, so if he sees or hears a certain bird he records it, to have a close idea of the species of birds that there are in a certain location, the problem would be that it only records trends at fixes locations in the ecosystem.
If 1 insect eats 25 pieces of plant material to live, it would simply have 25 pieces of methyl mercury in its body. :)
The first line of barrier that support the immune system by the invading microorganisms is formed by the skin and the mucous membrane.
<h2 /><h3>
What is immune system?</h3>
A network of biological processes called the immune system guards an organism against disease.
<h3>How do skin and mucous membrane support the immune system?</h3>
The skin acts as the first line of defense and has specialized immune cells that help prevent the microorganisms from entering the body.
The mucous membrane which is more sensitive and lines up the internal organs of the body can sense and eliminate the microorganisms thus helping the immune system.
Learn more about the immune system with the help of the given link:
brainly.com/question/13257880
#SPJ4
Answer:
I am secondary level student and this doesn't belongs to my coure till yet however..i have written this through google.....you may search there as well..
Explanation:
Enzyme activity occurs within a narrow range of temperatures compared to ordinary chemical reactions. As you have seen, each enzyme has a certain temperature at which it is more active. This point is called the optimal temperature, which ranges between 37 to 40C°...