Models are important in the study of earth science because many major concepts in earth science are too large and complex to study in lab true or false

answer: blah

explanation:

bc blah

i think its y= -4x-14

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.