Only about 10 percent of the energy in a trophic level is available to organisms at the next trophic level

Are salt and soap nutrients or toxins for yeast? explain.

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.

Vessels draining the myocardium of the heart, open primarily ,into which chamber?