Identify the structure of the human heart which is a muscular chamber that pumps blood out of the heart and into the circulatory system.
a) atrium
b) ventricle
c) coronary artery
d) pulmonary artery

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.