Which best explains fertilization? Check all that apply An egg can be fertilized by only one sperm
An egg releases substances that allow the sleek to enter
A sperm has a flagellum that helps it reach the egg
Fertilization occurs in the uterus
The tail of the sperm enters into the egg along with the head

A, C, D, E I think Fertilization is the fusion of haploid gametes, egg, and sperm, to form the diploid zygote. Note though there can be subtle differences in the fertilization process which occurs naturally within the body or through reproductive technologies outside the body, the overall product in both cases is a diploid zygote

Explanation:

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the real answer is b. scintillation counter