Which statement best explains why water is essential for all living things? A) Water makes up 65% of human beings.
B) Water is an essential component of blood.
C) Water covers 7596 of Earth's surface.
D) Water is necessary for cellular functions.

Which flexible structure that supports the nerve cord and led to the backbone

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.

Where substance is produced during cellular respiration