Too many in the water make aquatic plants grow so much that when they die, their decomposition causes the death of animal life from lack of oxygen. Sedimentation

Nutrients

Toxic/Hazardous chemicals

Microorganisms

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.

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

The body of water found at number 4 on the map above is the