Explain how a nutrient can be a limiting factor in an ecosystem

What are genotypes? what are phenotypes?

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

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.