Answer: D) By decreasing the activation energy of a reaction
A catalyst is a substance that speed up the rate of chemical reaction without affecting the product of the reaction. They only affect the rate of reaction not the yield of reaction.
Catalyst provide an alternative reaction pathway that has lower activation energy than that of uncatalysed reaction. It increases the frequency of collision and because of these greater collision which lowers the activation energy of the reaction.
The kidneys are the organs responsible for filtering the body from excess materials like salts and other by-products that can be found from ingesting food and medicines. Without the functions of the kidneys the body will get poisoned because it can't process such waste and bring it to the excretory system in the form of urine and feces.
The dialysis machine acts out as kidneys in the body, when it is attached, blood is transfused into the machine and the machine filters the blood. As this happens, the blood is then returned to body clean and free from toxins.
Answer:
0.5
Explanation:
Given, gene O results in production of pigment.
OO, Oo = Orange
oo = white
If Oo X oo :
O o
o Oo oo
o Oo oo
Half of the progeny will have Oo genotype so they will be heterozygous and will have orange fur. Other half will have oo genotype so they will be homozygous recessive and will have white fur. So the odds of having a white tiger cub is 0.5.
That answer is A. Hopefully this helps.
The correct answer is - C and D.
The principle of original horizontality means that the rock layers have been order by age, with the layers at the top being the youngest, while the layers at the bottom being the oldest.
In this picture it is little hard to tell which rocks belong to the same layer from first look because there are multiple twists and turns, an uneven surface, caused by pressure on the crust.
By carefully examining the image though, we can trace the layers more properly and see which ones are younger, which older, and which have the same relative age. In this case, we can see that the markings C and D are actually on the same layer of rocks, thus being a good indication that they have the same relative age.
