15. which of the following is not a means of water erosion?
a. natural springs
b. ocean waves
c. streams
d. rivers

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Where substance is produced during cellular respiration