What is an example of calcareous plankton that has shown a marked decrease in calcification rates when exposed to CO-rich water?

A. Coccolithophores
B. Diatoms
C. Radiolarians
D. Silicoflagellates
E. Porifera

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.

What is gene expression control that occurs after the generation of rna

When are the centromeres broken in meiosis?