It is very important to control the conditions of an experiment because FAILURE TO DO THIS WILL MAKE THE RESULTS OF THE EXPERIMENT INVALID.
A controlled experiment refers to an experiment that is conducted under controlled conditions. Conducting experiments under controlled conditions helps scientists to minimize the changes in all other variables with the exception of the ones been tested.
The correct answer is: mountains.
This picture represents the continent to continent collision.
Continent-continent collisions bring on some of the world’s largest mountains ranges.
Enormous slabs of crust (or two continental plates) collide and two continents become welded together. Numerous and large earthquakes occur at this places.
The most well-known example of continent-continent collision zone is the Himalayas (India collided with Asia).
Answer:
the availability of money
Explanation:
Attachment of acetyl groups to histone promotes transcription.
This mechanism is known as histone acetylation and it is a part of gene expression. The lysine residues inside the N-terminal tail from the histone core of the nucleosome are the substrate for enzymes-histone acetyltransferase which transfer an acetyl functional group from another molecule. Acetylation removes the positive charge on the histones and thus decrease the interaction negatively charged phosphate groups of DNA. As a result, chromatin becomes more relaxed structure and transcription is promoted.
