7. Which of the following is NOT a characteristic that helps define syhthetic materials? A) made from natural resources
B) underwent a chemical reaction
C) made to fit a specific function
D) made using metal

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?

The lab procedure involves several factors, listed below some were variable and some were constant. label each factor below v for variable ot c for constant