4. Domestic dogs can be very small (like lap dogs) or very big like Irish wolfhounds). Almost all domestic cats have a mass between 6 kg and 10 kg
Why do you think domestic cats are all about the same size, while dogs can vary
so much in size? Explain your answer. (2)

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).