Stem cells are a class of undifferentiated cells that are able to differentiate into special cell types.
They are important because they represent an area in medicine, because they have the potential to regenerate and repair damaged tissue.
Not all stem cells come from embryos but also bone marrow, your teeth and other places.
The answer is D I believe
6 hours break down:
1 hour – surfing the internet
2 hours – playing his favorite game
2 hours – watching TV
1 hour – doing his homework
He needs more than 2 hours to finish his homework. The best option is 1) HE WILL SPEND ONE EXTRA HOUR ON HOMEWORK AND GIVE UP WATCHING TV.
When he gives up watching TV, he has 2 extra hours to finish his homework. Add it to his 1 hour budget for doing homework, he will have a maximum of 3 hours to finish his homework.
Answer: He will play his favorite game for one hour and do homework for two hours.
Explanation: Skipping one of the tasks altogether will be a bad idea. He already have one hour for his homework and he will simply reduce his game playing hours from two hours to one and will utilize that hour of game for completing his homework. With doing so, he will be able to perform all planned tasks without skipping any task and still be able to present complete homework at school.
Hope this helps.
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