A galaxy is a group of stars, interstellar gas, dust, etc.
There are different types of galaxies. They are all categorized by their shape:
Spiral: a spiral galaxy has a disc in the centre and curved arms that come out of it.
Irregular: it does not have a specific shape. It is just a mass of things.
Elliptical: an elliptical galaxy looks basically like a disc in the universe.
I hope it helps. I tried to explain it as easy and as simple as possible!
Movement of food in the small intestine. Thus, option "D" is correct.
<h3>What is the autonomous nervous system? </h3>
ANS is divided in two opposite systems: sympathetic and parasympathetic:
Parasympathetic nervous system: characterized by the tag "rest and digest" it decreases the heart rate, blood pressure, and breath. It increases the gastrointestinal motricity, letting the organism resting (this happen after a meal).
Sympathetic nervous system: characterized by the tag "fight or flight" it increases the heart rate, blood pressure, and breath. It decreases gastrointestinal motricity, letting the organism focus on its environment (this happen when we are in danger).
Thus, option "D" is correct.
To learn more about autonomous nervous system follow the link:
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Answer:
I can tell you now that its definitely not D., C, or E. However, I'd debate that it'd be either A. or B.
Me, I'd go with b, but it could be either a or b.
Altruism has NOTHING to do with bee's as it is the belief of putting yourself aside for the well-being of others, but in biology, it refers to behavior by an individual that increases the fitness of another individual while decreasing the fitness of the actor.
Hearing has NOTHING to do with the reproductive system.
Nothing is to too small to have functional ears.
D,E, and C don't make sense.
Explanation:
