Which are infectious diseases? Check all that apply. [ 1]cancer
[ 2]cholera
[ 3]typhoid
[ 4]malaria
[ 5]HIV/AIDS
[ 6]heart disease
[ 7]tuberculosis

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.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land