If the total amount of energy in the producer-level ecosystem is 40,000 kilocalories, how much energy is available for the first-level consumers? 4,000 kilocalories 400 kilocalories 40 kilocalories 4 kilocalories

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.

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an

The negative impacts of nonnative species generally outweigh the positive impacts