The wings found on ostriches are known as a- homologous structures b-vestigial structures c-analogous structures d-symmetrical structures

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

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

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere