Which of the following is a component of cell thoery. A. Plant cells have a cell wall.
B. Cells were discovered in 1665.
C. Every living thing is made of cells
D . There are two types of cells: Eukaryotic cells and Prokaryotic cells

What did hunter gathers do to alter the environment?

What is an endocrine function? (apex) a.esophageal glands release mucus into the esophagus b.salivary glands release saliva into mouth c.swear glands release sweat to the skin d.the pineal gland releases melatonin into the bloodstream

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.