Alight weight material is being tested effectiveness in blocking ultraviolet rays from the sun that cause skin to burn and possibly develop skin cancer. which method would be most for tezting this material?

Why is excretion necessary to maintain homeostasis?

An organism has the following traits multicellular cant photosynthesize has a skull. wht kingdom does this organism most likely belong too?

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.