2. Explain how cell specialization and the idea of levels of organization (cells -> tissues -> organs -> organ systems -> organism) interact to the benefit of a multicellular organism. You can use an example of a specialized cell (blood cell or skin cell or any other specialized cell) that we have talked about in class. will give brainliest

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.

Polar zones are cold and tend to be dry because of a pressure system of cold. low high