What is all matter made of

What type of lipids are found in all biological membranes?

Ascientist and her team counted 200 individual deer in an area of 10 square kilometers. what is the population density?

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.