<h2>Water temperature is the right answer</h2>
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B) can be destroyed by variations in temperature or pH
This is because a change in the temperature or pH changes the shape of the active site of the enzyme so the substrate can no longer bind to the active site. The enzyme has become denatured.
Fertilization is the process in which two haploid gametes fuse to create one diploid cell. In this process, male sperm fuses with female egg which creates a zygote.
Differences between<span> a </span>physical and chemical change<span> in matter or substances</span>
It would be, the presenc<span>e of a membrane-bound nucleus.
I hope this helps!</span>