d. nitrogen cycle they are key in bacteria
Yes they can because the catalyst does not take part in the chemical reaction and remains unchanged after the reaction has ended. Biological catalysts are known to be recycled by the bodies in which they work.
Answer: Blood is slightly more viscous then water, pH is slightly alkaline it is about 8% of ones body total body weight the rest of the options are slightly wrong.
Explanation: Blood is red in colour, a dark red when it is deoxygnated and bright red when oxygenated. Its normal pH is 7,4 making it slightly alkaline and it accounts for 8% of one's total body weight with 92% being water. Its temperatures ranges around our normal body temperature which is 37°C.
Answer: Public opinion on climate change is the aggregate of attitudes or beliefs held by the adult population concerning the science, economics, and politics of climate change. It is affected by media coverage of climate change
Explanation: According to the Pew Research Center 74% consider climate change to be a serious problem and 77% say that it is harming people now, 20 points higher than the global median. The same study showed that 63% of people in Latin America are very concerned that climate change will harm them personally.