Sarah decides to monitor the tides at her local beach. she reads tide charts and creates the graph below. what type of tide occurs at the local beach?
. a) diurnal
. b) mixed
. c) semi-diurnal
. d) spring

What two fields of study provide the core information that is used to classify organisms?

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.

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes