Question

what continent has the highest diversity of hominin fossils?
a. asia
b. africa
c. south america
d. north america
e. australia
value: 10
people with light skin ____.
a. found closer to the poles
b. higher level of vitamin d production
c. lower folate destruction
d. lower melanin production
e. all of these
f. none of these
value: 10
what characteristic is unique to humans
a. single binocular vision
b. opposlable thumb
c. lacking a tail
d. bipedal locomotion
e. all of these

Explanation:

• First question: Hominin fossils are most diverse in Africa. This is because Africa is considered the cradle of humanity, and extensive fossil evidence of early hominins has been discovered there.
• Second question: People with light skin are found closer to the poles (as there is less sunlight, and lighter skin allows for better vitamin D production). They have higher - level of vitamin D production (since less melanin blocks UV rays for vitamin D synthesis), lower folate destruction (less UV - induced folate breakdown), and lower melanin production. So all of these (e) are correct.
• Third question: Bipedal locomotion is a unique characteristic of humans among the options. Many animals have single binocular vision (e.g., some primates), opposable thumbs (e.g., some other primates), and lack of a tail (e.g., some apes). But bipedal locomotion is a key trait that distinguishes humans in a more unique way in the context of these options.

Answer:

• First question: B. Africa
• Second question: E. All of these
• Third question: D. bipedal locomotion