In the Section "Investigating Life: What Makes Us Human?," the Scientists

question 17

Multiple Choice

In the section "Investigating Life: What Makes Us Human?," the scientists questioned what

• A)genetically differentiates humans from our closest relatives.
• B)caused human brains to be more advanced than other animals.
• C)caused humans to walk on two limbs compared to primates,who walk on four limbs.
• D)physically separates humans and chimpanzees from other primates.
• E)chromosomes all primates have in common.

---

Definitions:

AIDS Virus

The Human Immunodeficiency Virus (HIV) that causes Acquired Immunodeficiency Syndrome (AIDS), a disease that severely undermines the immune system by destroying important cells that fight disease and infection.

Placental Barrier

The physiological barrier formed by the placenta that separates the fetal blood circulation from the maternal blood circulation, allowing the exchange of nutrients and wastes while blocking harmful substances.

Breastfeeding

The natural act of feeding a baby with milk from the mother's breast.

Prenatal Period

The prenatal period is the developmental stage that occurs from conception to birth, encompassing the growth and development of a fetus inside the mother's womb.