Cells Can<span> Replicate </span>Their DNA<span> Precisely. Replication is the process by which a double-stranded </span>DNA<span> molecule is copied to </span>produce<span> two identical </span>DNA<span> molecules. ... Each time a </span>cell<span> divides, the two resulting </span>daughter cells<span> must contain exactly the same genetic information, or </span>DNA<span>, as the parent </span><span>cell</span>
If the concentration of sodium outside the cell is more than inside , so to take out the sodium , ATP is used as the cells has to work against concentration gradient !
You can see this in Neurons as a example ! There is sodium pump to throw sodium out of cell !!
Answer:
A.Earth's early atmosphere lacked oxygen, which multicellular organisms need to break apart food
Explanation:
One important feature that led to the development of multicellular organisms was the rise of oxygen-producing photosynthetic bacteria. Prior to this development, the unicellular organisms (anaerobes) then present on Earth obtained energy from inorganic fuels.
However, with the presence of oxygen in the atmosphere, a shift was observed as organisms that could obtain energy from the reduction of energy became predominant. This unicellular aerobes later paved way for the evolution of multicellular aerobes.
Depends on the magnification you are looking for... usually, a light microscope is enough (1000x max magnification)...
An electron microscope is powered by high energy beams and can magnify many times higher than the light microscope (where magnification is limited by the wavelength of light). The magnification of an EM is on the nano scale.
(P.S.: as a chemist, I'd always choose an EM over an optical microscope as I can always zoom in or out depending on my needs) ;)
