Answer:
Explanation:
Alleles are the pairs of genes occupying a specific spot on a chromosome. That spot is called locus. For example, a pair of alleles controlling the same trait, i.e. eye color: one allele codes for blue eyes, another allele for brown eyes.
30. mixture of compounds
31. compound
32. element
33. compound
34. compound
34. mixture of elements and compounds
Would that be the river mouth?