Answer: Bundles of axons in the central nervous system are called a "tract" 
Explanation:
Axons(nerve fiber) consist of long slender projection of neurons or nerve cells that conduct and transmit impulses away from the neuron or nerve cell body. Axons are surrounded by endoneurium layer which contain protein fluid that surround each axon. 
Bundles of axon in the CNS is known as tract. We have ascending tracts and descending tracts. The ascending tracts function are to conduct and carry impulses along the spinal cord to the brain while the descending tracts transmit and carry the impulses from the brain to lower regions (downward) of the body. Tracts are identified by their origin (where the bundle start) and also the end/termination of axon bundle. 
The largest tracts are fasciculi gracilis and cuneatus which are known as ascending tracts. 
 
        
             
        
        
        
Answer:
Euryarchaeota
Explanation:
Ferroplasma
Scientific classification
Domain:	Archaea
Kingdom:	Euryarchaeota
Phylum:	Euryarchaeota
 
        
             
        
        
        
 900J
Explanation:
Given parameters: 
Specific heat of the aluminium = 900Jkg⁻¹K⁻¹
Mass of aluminium = 0.5kg
temperature change = 2K
Unknown: 
Quantity of heat = ? 
Solution: 
The quantity of heat a body absorbs to cause a change in temperature is given as: 
   H  = mcΘ
H is the quantity of heat 
m is the mass of the substance 
c is the specific heat capacity
Θ is the temperature change 
   
    H = 0.5 x 2 x 900 = 900J
learn more; 
Specific heat brainly.com/question/7210400
#learnwithbrainly
 
        
             
        
        
        
Hello, Saleemsafwah12. The answer would be A - It is younger than the rock layer below. This is because the deeper you go, the older the rock is, opposed to the top layer being the youngest of them all. I hope I helped!! Have a great day.