Why do scientists study the geologic record? a. to understand the history of Earth and the changes that have happened

b. to be able to write a textbook

c. because they have to

d. to find fossils

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.

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.