Answer:
no work was needed. Blinking does not require using energy sometimes we blink without thinking.
Explanation:
Answer is: <span>negative beta decay.
</span>
Nuclear reaction: ¹⁴C → ¹⁴N + e⁻ + νe (electron antineutrino).
<span>In beta minus decay (atomic number Z is increased
by one, from 6 in carbon to 7 in nitrogen) neutron is converted to a proton and
an electron and an electron antineutrino.
</span><span>Beta decay is radioactive decay in which a beta
ray and a neutrino are emitted from an atomic nucleus.</span>
<span>The answer is the first option. Enzyme and substrate bind using a lock-and-key mechanism. Enzymes act on a specific substrate and a substrate needs a specific enzyme, this is what is called a lock-and-key mechanism. Enzymes and substtates are like a key and a lock, one is for each other.</span>
It is a physical change because you can not put it back like it was
