The independent (or manipulated)variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (orresponding) variable is the one that is observed and likely changes in response to the independentvariable.
2. Mitosis (2n --> 2n)
3. Meiosis (2n --> 1n)
If the original organism has twenty, there would be ten left.
I'm pretty sure your talking about Vertebrates
Answer: Calcitonin causes extracellular Ca2+ levels to decrease.
Explanation: