Both cells are formed in bone marrow.....but t cells matures into thymus....and b cells matures into bone marrow ! both helps in defense ! 
B cells can connect to antigens right on the surface of the invading virus or bacteria. 
T- cells can only connect to virus antigens on the outside of infected cells.
for more info , comment !
        
             
        
        
        
Answer: English 
. mathematician
. physicist
. astronomer
. theologian
. author
Explanation:
Take the points, Im leaving Brainly.. Why?!
 
        
             
        
        
        
Answer:
Explanation:
The calcite Crystal can be identified by carrying out an acid test on it. This is done by bringing it in contact with a weak acid which cause crack in it structure. Hence a little of carbondioxide gas is released. 
Since diamond is the hardest object,it can be identified on a Mohs scale. Likewise it can be tested by bringing it in contact with a newspaper, if the letters on the paper are not seen, that shows it is a pure diamond.
Window glass is identified by the code on it.
While Quartz Crystal is identified by scratch test. When it is used to scratch all other softer stones and metal, it leaves mark on them.
 
        
             
        
        
        
Answer:
c) 
  V_local = -x/t^2
  V_convec = x/t^2
d)
 a =  V_local +  V_convec = 0
e) When a particle moves towards postive x direction its convective velocity increases, but at the same time the local velocity deacreases (at the same rate) when time increases
Explanation:
Hi!
You can see plots for a) and b) attached on this document
c)
The local acceleration is just teh aprtial derivative of the velocity with respect to t:

And the convective acceleration is given by the product of the velocity times the gradient of the velocity, that is:

d)
Since the acceleration of any fluid particle is the sum of the local and convective accelerations, we can easily see that it is equal to zero, since they are equal but with opposit sign
e)
This is because of teh particular form of the velocity. A particle will move towards areas of higher velocities (convectice acceleration), but as time increases,  the velocity is also decreasing (local acceleration), and the sum of these quantities adds up to zero