Match these items. 1. send out a. DNA
2. controls heredity b. absorption
3. groups of tissues working together c. protein
4. take in excretion
5. substance that builds tissues d. organ

What heat is removed how does a gas become a liquid

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

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.