If I'm right I'd say They control and direct the quantity of food passing through the digestive organs and prevent backward movement of partially digested food. Hope it's helpful.
Answer:
It is dangerous if directly inhaled, it is not a very abundant energy source and it releases the most toxins when burned i think :))
Explanation:
A- the ratio to surface area
Answer:
Explanation:
All cells come from pre-existing cells
Basalt is an extrusive igneous rock that is very dark in color. ... Basalt forms when lava reaches the Earth's surface at a volcano or mid ocean ridge. The lava is between 1100 to 1250° C when it gets to the surface. It cools quickly, within a few days or a couple weeks, forming solid rock.
