What are on the surface of most vertebrate cells, acting as markers of self?

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.

Can someone me i need the answer and don’t understand?

What is the name of the group of elements that are a good conductor of heat? (5 points) select one: a. alkali metals b. halogens c. noble gases d. nonmetals