Acceleration is a little more complicated. It is defined as the rate of change of the object's velocity over its change in time. ... Or, if the acceleration is negative, it's called deceleration and describes something slowing down. For something to speed up or slow down, it has to have a certain change in velocity
        
             
        
        
        
Answer:
I believe a layer deep underground would have older things, because the ground could erode over time causing the fossil to sink into the ground.
 
        
             
        
        
        
The food sources available for a particular species in an ecosystem. Also space where they can live and reproduce, but food is the main factor.
        
             
        
        
        
Insect immunity doesn't include the property of an enzyme activation of pathogen-killing chemicals. 
What is enzyme activation of pathogen?
Due to various trehalose's importance in pathogenic organisms, there has lately been a surge of interest in trehalose metabolism for therapeutic applications. 
- TPP (trehalose-6-phosphate phosphatase) is an important enzyme in the most important biosynthetic pathway (OtsAB). 
- The enzyme properties of recombinant TPPs from five key nematode and bacterial pathogens, including three new members of this protein family, are compared here. 
- The kinetics of trehalose-6-phosphate hydrolysis demonstrate that all five enzymes exhibit burst-like kinetic behaviour, defined by a drop in enzymatic rate beyond the pre-steady state.
-  Multiple global conformational changes in members of this enzyme family during substrate processing can explain the observed super-stoichiometric burst amplitudes.
Hence, the correct answer is option A
Learn more about Pathogenic organisms here, 
brainly.com/question/12574945
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Answer:
B. Viruses are smaller than Bacteria and Archaea
C. Viruses do not belong to any of the three domains: Bacteria, Archaea, and Eukarya
E. Viruses are as old as Bacteria and Archaea
F. Viruses are unable to perform replication on their own