B An ecosystem because it is i dont know how to explain but i think is that one
Three states of matter. solid, liquid, and gas.
solid. water molecules are close together and vibrate, definite size, fixed shape.
liquid.
gas.
The state of matter molecules move the slowest.
The state of matter molecules move the fastest.
Melting.
Boiling.
I am going to go with either C,A B.
I'm not entirely sure. it's just what i think
Answer:
The answer is double helix.
Explanation:
In its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases. Watson and Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix.
Hope this helps!! ;)
