Why Are Grass-Fed Animals Considered to Represent a Net Gain

question 37

Multiple Choice

Why are grass-fed animals considered to represent a net gain for the human food supply?

• A)They are raised following ethical guidelines.
• B)They eat only what they have naturally evolved to eat-that is,grass.
• C)They eat grass that humans cannot eat on land that is otherwise unsuitable for human crops.
• D)They are raised on pastureland that does not require pesticides and fertilizer.
• E)All of these answers are correct.

---

Definitions:

Progesterone

Steroid hormone secreted by the corpus luteum and one of the hormones secreted by the placenta.

Ductus Arteriosus

A fetal blood vessel that allows blood to bypass the lungs, which closes soon after birth to establish the regular circulatory path.

Ductus Venosus

A fetal blood vessel that connects the umbilical vein to the inferior vena cava, allowing oxygenated blood from the placenta to bypass the liver and enter the systemic circulation.

Fetal Lungs

The lungs of a fetus, which are not used for breathing air but are critical for the development of the respiratory system.