Half-life = time in which half of material is lost
1/4 = 1/2 x 1/2 so 2 half lives have gone by if only 1/4 of it is left.
age of rock = 2 x half life = 2x1.3 = 2.6 billion years.
Answer:
Action potentials can travel along axons at speeds of 0.1-100 m/s. This means that nerve impulses can get from one part of a body to another in a few milliseconds, which allows for fast responses to stimuli
Explanation:
There is a valve at the meeting point between each ureter and the bladder prevents the back flow of urine from the urinary bladder to the kidney
Answer:
See Explanation
Explanation:
. Uses a focused beam of electrons instead of light
. Reaches up to 10,000,000x magnification
. Used to investigate the ultrastructure of a object.
. Used beyond fields in science and biology.
. Reaches extreme detail for an given object.
Hope this helps
