The answer is : three psychoactive drugs.
The coffee, the cigarette and alcohol are all examples of psychoactive drugs.
These drugs or substances act primarily upon the central nervous system where it alters our
brain function, changing temporarily our perception, mood,
consciousness and behavior.
Even though they are licit, they have the same effect as illicit drugs like: heroin, cannabis, meth, ecstasy and cocaine.
Answer:
The cell cycle is mainly regulated with the help of three checkpoints: G₁ checkpoint, G₂ checkpoint, and M checkpoint.
G₁ checkpoint checks for
- DNA (deoxyribonucleic acid) damage.
Hence, it can be correctly matched with checks for cell size and DNA damage.
Only after passing through this check point the cell enters the S or synthesis phase where the DNA content is doubled.
The G₂ checkpoint is present between G₂ phase and M phase. It checks the cell for its protein reserves as well as if the DNA has replicated accurately or not.
If cell passes this checkpoint then it enters into the M phase.
Hence, it can be correctly matched with checks whether DNA has doubled and repairs it if damaged
Lastly, the M checkpoint checks if spindle microtubules are properly attached to the centromeres of all the chromosomes.
This checkpoint allows the progression from metaphase to anaphase.
Hence, it can be correctly matched with microtubules have attached to the centromeres of the chromosomes.
Answer:
Two parameters are especially important in microscopy: magnification and resolution. Magnification is a measure of how much larger a microscope (or set of lenses within a microscope) causes an object to appear.
Hello,
If a new body of evidence were found that directly contradicted the cell theory, groups of scientists would then start formulating new theories.
Answer:
"The most significant effect of population growth in Europe from 1700 to 1800 was urbanization and the creation of large cities which was marked by poverty, crime, and poor sanitation.” Historians have identified several causes for the Industrial Revolution, including: the emergence of capitalism, European imperialism, efforts to mine coal, and the effects of the Agricultural Revolution. Capitalism was a central component necessary for the rise of industrialization.
