Which happens during the second trimester?
O A. The vocal cords develop.
O B. The heart starts working.
C. Rhythmic breathing starts.
D. Blood begins to form.

Imagine a rocket launching from earth and travelling to the moon. in which order would the rocket pass through the layers of the atmosphere? thermosphere, mesosphere, stratosphere, troposphere troposphere, mesosphere, stratosphere, troposphere thermosphere, stratosphere, mesosphere, troposphere troposphere, stratosphere, mesosphere, thermosphere

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

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