The pointed tip of the heart that is directed toward the left hip is called the

What are two reasons for why a species might disappear from the fossil record?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.