Final answer:
The claim that incomplete proteins come from animal sources is false. Animal products usually provide complete proteins, while most plant foods are considered sources of incomplete proteins, with some exceptions like soy. option is false.
Step-by-step explanation:
The statement "Incomplete proteins come from animal sources" is false. Proteins can be classified as either complete or incomplete. Complete proteins, which provide adequate amounts of all nine essential amino acids, commonly come from animal sources such as meat, fish, milk, and eggs.
On the contrary, most plant foods are considered sources of incomplete proteins because they often do not contain all essential amino acids, although there are exceptions like soy. Therefore, animal sources are typically associated with complete proteins, not incomplete ones.
For individuals who do not consume animal products, it's important to consume a variety of plant-based foods to ensure they receive all essential amino acids. This can be achieved by combining different plant foods with complementary proteins, where the amino acids missing in one food are supplied by another.