Fossil fuels are found in the outer-layer of the Earth called the crust.
Answer:
i know prokaryotic cells don't have a nucleus and eukaryotic cells do have nucleus.
Cell therapies would use stem cells,<span> to replace or rejuvenate damaged tissue. Scientists also want to use </span>stem cells<span> to understand disease and find drugs that might treat it. </span>Embryonic stem cells<span> could be used to make more specialized tissues that have been lost to disease and injury.</span>
Answer:
A detergent molecule consists of a polar ionic head and a non polar hydrocarbon tail. Polarity of a molecule is due to difference in electronegativities of constituting atoms. For example O-H bond is polar because oxygen is very electronegative compared to hydrogen (3.44 vs 2.2) so O acquires a partial negative charge and H acquires a partial positive change making the bond polar.
Detergent tail molecule is non polar because it is made of hydrocarbons i.e. hydrogen and carbon atoms. Carbon atoms are bonded to each other and to hydrogen atoms. Electronegativities of carbon and hydrogen are almost same ( 2.55 and 2.2 respectively ). The difference is not much to induce polarity in C-H bond also hydrocarbon tails have maximum C-C bonds which have no polarity because both the atoms are same.Hence, the tail of detergent molecule is non polar.
There are 5 numbers: 0,1,2,3,4.
m = 5, n = 3;
The probability of success:
P ( A ) = m / n = 3 / 5 = 0.6, or 60 %.
Answer: D) 60%
