The kidneys contains millions of tiny filtering units called (1 point) urine. villi. peristalsis. nephrons

At what age does trust usually begin to develop? a. 25 weeks b. 20 weeks c. 15 weeks d. 10 weeks

True or false a fertilized cell divides many times to form an embryo

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.