Write down the sources and deficiency symptom of calcium

Explanation:

Causes of hypocalcemia (calcium deficiency):

- Menopause

- Low levels of vitamin D

- hormonal imbalances (removal/overactivation of parathyroid)

- renal failures

Symptoms of hypocalcemia:

- Memory loss or confusion

- muscle spasms

- numbness/tingling in the extremities (hands, feet, face)

- brittle nails

- more prone to fractures

enzyme speed up the reactions

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.