Plz help. what does Archaeopteryx prove about modern birds?​

In which situations is the principle of cross-cutting relationship useful in determining relative age?

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.

Does all the energy stored by the phytoplankton reach the top level of the pyramid