Which set of alleles are heterozygous?
A) HH
B)hh
C)Hh

B)hh

Explanation:

C.) Hh

Explanation:

An allele that contains one dominant trait and one recessive trait is heterozygous.

I hope I helped, have a good day :)

geologic time scale (for gradpoint) =)

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers