Explain the reasons why scientists are reconsidering evolutionary relationships between animals such as arthropods and nematodes.

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

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

What happens when two nitrogen atoms share electrons