Give one example of a disturbance that can lead to primary succession

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

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