Answer:
d is correct answer to your question
Answer:
the amount of calcium is variable.
Explanation:
osteoporosis is an illness that is caused by lack of calcium in a person's body.
Potential energy (water in Dam) to Kinetic energy (Water flowing down to generator) to mechanical energy (Water turning generator) to magnetic energy (in airgap of the generator) to Electrical energy (in the coils of the generator)
The crossing over mechanism of genetic variation results from the exchange of gene segments between non sister chromatids. The correct answer is A.
