I believe the answer is The spindle fibers
Microtubule will form the spindle fibers that will grab the chromosome. The formation of microtubule will be start from prophase and it will have role in moving the chromosome through the metaphase and anaphase. If the substance disrupting the formation of microtubules, then spindle fibers will not be formed.
Answer: A normal female karyotype is written 46, XX, and a normal male karyotype is written 46, XY.
Explanation:
The answer would be light. Light is needed in plants so that they can do the process of photosynthesis.
A Scientific Hypothesis Must Be "Falsifiable". A scientific hypothesis must be testable, but there is a much stronger requirement that a testable hypothesis must meet before it can really be considered scientific