As a fertilized frog egg develops into an embryo, it undergoes (H. B.2D1)
a. One meiotic cell division, only
b. Many meiotic cell divisions
c. One mitotic cell division, only
d Many mitotic cell divisions

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bacterium is not correct

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.