A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria.
<span><em>Whether living or non living:</em>
<em>When you put a sample of tissue under a microscope, if u can see a cell membrane, and can identify some cell structures like nucleus, mitochondria, vacuoles etc. , it was living, if not, its a non living thing.</em></span>
<span><em>However some cells don't have a nucleus( eg. prokaryotic cells), but all cells have a cell membrane or some sort of protective covering to contain the cell's insides. </em></span>
<span><em>To check if your specimen maybe-once living, maybe-still living "something", is living, get a look at it through an electron microscope - thats the best microscope ever- and see if the mitochondria's making any ATP( adenosine triphosphate, source of energy for most organisms), if it does, its living. If not, no</em></span><em>n living. :)</em>
Answer:
Evaporation is the process which allow water molecules to move between lakes and the atmosphere.
Explanation:
Evaporation is a process in which water which is present in liquid form in lakes and ocean evaporated in the form of water vapours. These vapours goes upward and form clouds which moves toward hilly areas with the help of wind. The water present in the clouds come back to the land in the form of rainfall and snowfall. This water flows through the streams and collected in the rivers again and repeat this process.
Answer:
Mass does not affect gravity and distance has an indirect relationship.
Explanation:
The equation for gravity is, g = 
where, G = gravitational constant
M = mass of the planet
R = distance between the bodies (object and center of planet)
so, gravity depends on the mass of planet, not on mass of object
and is inversely proportional to sqaure of distance.
