It has been estimated that active tobacco smoking causes close to 90% of lung cancer cases and is the cause of 87% of lung cancer deaths.
Answer:Sea levels change for three main reasons: 1) As water warms and cools it expands and contracts; 2) The amount of water contained as ice on land surfaces changes over time; 3) The Earth's surface is dynamic and can move vertically.
Explanation:The first two reasons are directly caused by global temperature changes.
Answer:
Answer is 512 nucleosomes.
Explanation:
Below statements are true:
<span>Acetylation of histone tails is a reversible process.
</span><span>Acetylation of histone tails in chromatin allows access to DNA for transcription.
</span><span>DNA is not transcribed when chromatin is packaged tightly in a condensed form.
</span><span>Methylation of histone tails in chromatin can promote condensation of the chromatin.
</span><span>Some forms of chromatin modification can be passed on to future generations of cells.</span>
Answer:
The binding of oxygen and hemoglobin is also an important reversible reaction. Its how oxygen is carried around the blood to the cells of your body
Explanation:
A reversible chemical reaction is one that can go in both directions; reactants can turn into products, and products can turn back into reactants.
