Answer:
When you get sick first time your body will produce antibodies and destroy that bacteria or virus after producing that antibody your body has memory cell specialised for that antibody so you won't get sick everytime when you get that specific type of antigen
I think it will be B not fully sure
Answer:
b. Nuclear energy is contained in nuclear bonds.
Explanation:
Nuclear energy is contained in nuclear bonds which is released when these bonds are broken. Nuclear energy is more efficient than other forms of energy because it produces more energy as compared to other sources of energy production. There are some special type of contained in which certain materials are used to control the flow of nuclear energy and also to contained it.
Answer:
It is a safe and efficient method.
Explanation:
This method of dismantle the bridge is also a good one but there are some other methods also that are used instead of rope and pulley system such as destroy the bridge by using bombs at the base of pillars and cutting of each part in order to dismantle the bridge. This rope and pulley system is also an efficient way to dismantle the bridge so that's why the engineers used this method instead of other methods due to its safe method.
C ischemic is the correct answer
