Which of the following protects and cushions a developing fetus from shocks, keeps the temperature from varying much, and develops from an early layer of dividing cells ?
a) placenta
b) umbilical cord
c) amniotic sac
d) all of the above

The world’s richest 20 percent of the population consume about what percentage of all goods and services in a given year?

What is the difference between muscular strength and muscular endurance? a. strength refers to mobility of joints, while endurance refers to muscular force. b. strength refers to percentage of body fat, while endurance refers to sustaining activity over time. c. strength refers to muscular force, while endurance refers to sustaining activity over time. d. strength refers to the quality of physical performance, while endurance refers to mobility of joints.

Vitamin d is unique in that it has a site of synthesis that is different from the location of action, so it is considered to be a click the answer you think is right. enzyme. lipase. nonessential nutrient. hormone?