Friday, March 13, 2015

Essay

Have you ever wondered why when you cut yourself skin regrows. Your answer is.... stem cells, they are unspecialized cells that can turn into any specialized cell in this case a skin cell to regrow skin

People are inclined to like this idea as it can be a great technological leap to reable to grow limbs and important organs in the body e.g. heart, kidneys and lungs. In animals like mice its been able to regrow the top part of fingers on mice according to livescience.com.

Getting stems cells can happen two ways once is getting adult stem cells from the bone marrow and a other is to get them from a embryo and those type of stem cells are called embryonic stem cells and and virtually can grow into any body part such as organs and limbs e.g. arm, torso, heart, brain and the eyes it can be anything but on the other side the adult stem cells can only become specialized stem cells and dont have the same propertys as the other type have according to Mayoclinic.org. 

Furthermore stems cells have a great capacity to become anything in the body so if used in a specific way this can be a huge leap in medcine being able to regrow limbs and even organs i belive that this can be very good it might seem unethical but from one point you can let somone live or die and i prefer the first option witch is living. Even without stem cells we wouldn't be able to regrow skin so one little cut can mean dying that shows the importance of these cells.

Friday, March 6, 2015

Summative questions 1


1. Which influences who you are more - your genes (nature), or your environment (nurture)? Give a reason for your answer.

answer: Environment because if you go to a good school you will be very educated and have manners, it also affects your personality if your raised in a family of hooligans you will have a aggressive and mean personality as that is how you where thought how to act it also affects your emotions because if your environment is very happy you will too but if its not you will be depressed and your emotions are how you react to things so if your mad or sad you will most likely respond rude or mean and emotions can mean being happy about yourself or being so sad your contemplating suicide. example: Bob's family is very messed up his did drinks his mom is never home and his brother is doing drugs, bob is very sad so he contemplates suicide.
2. What could happen if DNA does not copy
itself properly?

Answer: if DNA does not copy itself properly you will will get a genetic mutation e.g Cancer, blue eyes, down-syndrome.
A way a gene can mutate is when it copies itself their are 6 in the original one but only 5 are their so because of that you will get a mutation as it was not like that before.

3. Give one advantage and one disadvantage of asexual reproduction and sexual reproduction. Explain your answers.


Answer: An advantage of sexual reproduction is that you carry the baby inside the womb the whole time so it will be less likely a animal or nature will kill it a other advantage is that their is genetic diversity so if one pathogen comes around it will kill the entire race. A disadvantage is that your stamina is lower as your carrying the offspring so if a tiger is running at the mother it will kill the mother a other disadvantage is that the mother can die giving birth to the offspring unable to feed it milk it will die.

A advantage of Asexual reproduction is that you don't need a partner to make the baby with so you only need 1 to make a colony. A disadvantage is that their is no diversity of the species so if one virus comes along it will wipe out the entire race as they are all identical.