Decide whether each statement about urine formation is true or false. The liver changes toxic substances into less toxic substances that then travel to the
kidneys.
The kidneys filter blood and produce urine.
Urine is made from the nutrients that are reabsorbed back into the blood from the tubules.
The kidney is the functional unit of the nephron.
Urine is produced in the nephrons of the kidneys.
Urine that is produced in the kidneys flows down the urethra to the bladder for storage and
then is excreted through the ureters.
DONE
Intro

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.