Help plz What evidence of climate change on continents supports the theory of continental drift?

A. signs that glaciers existed in South Africa

B. similar coal fields on different continents

C. change in atmospheric temperature over time

D. same animal fossils found on different continents

The trp operon in e. coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

Which structure in the cardiovascular system connect arteries to veins?

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient