Question

our closest living relatives on the evolutionary tree are: a gibbons b chimpanzees c gorillas d orangutans question 6 variations in skin tone correlate with a balance between these two vitamins. a b2 - riboflavin and b6 - pyridoxine b b7 - biotin and b9 - folate c d and b9 folate d d and b3 niacin e folic acid and b9 - folate

Explanation:

• First question: Chimpanzees share a high degree of genetic similarity (about 98 - 99%) with humans, making them our closest living relatives on the evolutionary tree.
• Second question: Skin tone variations are related to the balance between vitamin D (synthesized when skin is exposed to sunlight) and vitamin B9 (folate, which can be degraded by sunlight). Lighter skin allows more sunlight for vitamin D synthesis in regions with less sunlight, while darker skin protects folate in sun - rich regions.

Answer:

• First question: B. Chimpanzees
• Second question: C. D and B9 Folate