A haploid cell has 20 chromosomes. How many chromosomes does the diploid cell of that organism have?

this organism has 40 chromosomes

Explanation:

diploid = 2n

Haploid = n

haploid = 20 (in this case), so the diploid is...

diploid = 2 × 20

= 40

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.

the answer to your question is tooth decay.