The chromosome number in animals is kept the same from one generation to the next because of binary ission
-tiplession
O meioss
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mitosis/meiosis

Explanation:

Animals do not do binary fission; bacteria do that. Mitosis is well-known for its strict preservation of chromosome number but so is meiosis, via a series of checkpoints/strict regulation known as the cell cycle!

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.

energy per photon is e = h*c / λ  

e = 6.63*10^-34 * 3*10^8 / 6*10^-7 j = 3.315*10^-19 j  

nr. of photons = 10j / 3.315*10 = ^-19 j per photon = 3.02*10^19 photons