Which of these statements is true?
a. the left coronary artery is a branch of the left pulmonary vein.
b. the coronary sinus returns blood to the left atrium.
c. the coronary arteries arise from the pulmonary trunk.
d. the great cardiac vein collects blood from the anterior surface of the heart.
e. the pulmonary arteries carry blood to the left atrium

Witch type of microscope is used to view very small cell components like proteins and dna?

The green colored pigment in chloroplasts is? a. nitrogen b. chlorophyll c. chlorophorm d. chlorofloromethane

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano