I believe the answer is D. Unintentional/preventable
Answer:
because that one sperm cell have the 23 chromosomes to mix with the 23 in the egg.... to fertilize it
Explanation:
Hmmm, Social Health is your ability to form relationships with others, and also relates<span> to your ability to adapt comfortably to different social situations and act appropriately in a variety of settings.</span>
Everyday, morning or night, stand in front of the mirror after brushing your teeth and begin to name off everything you like about yourself. Even if it's not much, like you like your hair or your eyes, maybe your fingers? It's something you like about yourself. Your posture is another big thing. If you have a good posture, more people will try to interact with you, because you have a warmer posture now. Perhaps before you seemed a little closed off, but with a better posture, try sitting and standing with your back mostly straight and your head up, and you will have a slight aura of confidence, not so much that it's overbearing and arrogant seeming, but enough to show people that you are happy and confident within yourself. Maybe you value your intelligence more than your looks. Take pride in yourself and you will begin to feel more confident.
To build confidence in others, try giving someone a compliment a day, maybe that kid that doesn't look to have much confidence. Complimenting them on their clothes or perhaps their hair, maybe their shoes, or something. It could make their day and begin to boost their self confidence a little more, and you may even get a friend out of the situation.
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Answer:
in controlled experiment an independent variable is systematically manupulated and dependent variable is measured ; any extraneous variables are controlled
