Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
Answer: Filtration
Blood that is going to be filtered enters the first part of the nephron,
the glomerulus, which is a tuft
of capillary vessels. The glomerulus is inside a "sac" called a
glomerular capsule.Together, the glomerulus and the glomerular capsule
form the renal corpuscle, which is the filtering unit.
the first answer as blood needs to be oxygenated to be passes round the body then when its deoxgenated it will return to the heart to be pumped around the body again
Synchroniser switch is in the "on" position.
Answer:
Domains Archaea and Bacteria
Explanation:
