Because of the natural process of photosynthesis that always begins by absorbing light from the sun through proteins. And these reaction centres contain green chlorophyll pigments.
<em>leaves appear green because the photosynthetic pigment chlorophyll is present in the leaves .. when sun light or any other light falls on leaves ,this chlorophyll absorbs all the other colours of light and only reflect green ..so our eye can only detect this green colour and it seems that leaves or chlorophyll is green but actually the matter is with absorption spectrum.. <u>amazing fact : </u>if you fall red light on grass at night ,they will appear dark because they wont have any green light to reflect and they will absorb red light ..so our eye cant detect any colour :)</em>
Critical mass, in nuclear physics, the minimum amount of a given fissile material necessary to achieve a self-sustaining fission chain reaction under stated conditions.
<em>The F plasmid</em> is a example of an large plasmid, which contains qualities that permit the <em>plasmids DNA to be moved between cells</em>
<em>It is found in the bacterium E. This joining by means of a pilus so as to move DNA between microorganisms is known as conjugation. Thusly the F plasmid is known as a conjugative plasmid. </em>
The F-factor permits the giver to create a dainty, tube like structure <em>called a pilus</em>
which the benefactor uses to contact the beneficiary
The pilus at that point draws the <em>two microorganisms</em> together, at which time the contributor bacterium moves hereditary material to the <em>beneficiary bacterium</em>