Which of the following best defines the nervous system?
a. the nervous system is responsible for controlling and coordinating all of the activities of the body.
b. the nervous system is responsible for controlling and coordinating all of the movement of the body.
c. the nervous system is responsible for controlling and coordinating all the interactions of the body.
d. the nervous system is responsible for controlling and coordinating all of the synapses of the body.

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

The instructions for making proteins come originally from