In modern biology, there are three approaches to classifying organisms: systematics, cladistics and molecular evolutionary taxonomy. They are all based on organisms' relation to each other, but use different indicators to assign the degree of relationship
Answer: b
Explanation: the pressure from gravity in the inner core prevents the iron from melting to a liquid
Winter is caused by the tilt of the earths axis, hope this helps
Answer:
Explanation:
half life = 1600 years .
m = M x 
m is mass of the radioactive object after n half lives , M is original mass.
n = 4800 / 1600
= 4
Putting the valus of n and M we have
m = .25 x 
= .03125 g .
<span>A) the number of atoms on the reactant side equals the number of atoms on the product side</span>
