Greek armies were basically foot soldiers, Although armoured infantry who fought in solid formations (the phalanx) were superior to the unarmoured Persians, the latter had the advantage of strong cavalry, so Alexander acquired mercenary cavalry forces. He also added mobile light infantry who filled the gaps and were a link between the phalanx and the cavalry. This topped the Persians who tried to establish their own armoured infantry to match his, but they did not come up to the same standard and failed at the crucial battle of Gaugamela.
No elements combine to produce carbon. Carbon is an element in and of itself.
Sexual reproduction allows the organisms to combine DNA and produce offspring that may have better survival traits than either one of the parents. Even if an organism has both male and female organs, it is better for future offspring to combine these traits and try to produce a superior organism instead of just copying the DNA that is already there.
shoot.
compound
water
yes it can because two color combine together
combine dry ice and water
RCOOH + R'OH ---> ester + water
NADP+
respiration
compound
a compoundCOMPOUND