The answer is A
Using energy
Answer:
Make sure everyone meets criteria.
Not taking supplements( As some may contain Vit D)
No tanning beds
make sure no one has a hypoactive response to vitamin d through whatever way. Injection, capsule, spray.
Check for genetic conditions or cancers like melanoma which indirectly affect vitamin d levels
Explanation:
These are some of the main things to look out for
Population living in one place form a Community!
Answer:
His phenotype would be having dry earwax
Explanation:
Answer:
D. the answer is triangular