I think its b model b has more surface area and volume
        
             
        
        
        
Answer: it's usually cytokinesis in plant is from centre to periphery while animal is viceversa
Growth 1
 
        
             
        
        
        
I believe they cannot start with big trees and bushes because the there is not enough nutrients in the soil, so instead pioneer species pave the way for primary succession.
        
             
        
        
        
Answer:
true
Explanation:
Cerebrospinal fluids  is a  colorless fluid  that is secreted in the choroid plexus,and  circulates in the ventricles system  and sub -aranchinoid space  of the brain and spinal cord. its provides nutrients  to the surrounding  neurons, cushions the effects of trauma, pressure, acts as buffer and provides protection through immune  system .
it plays a vital role in regulating  blood flow, through a process called cerebral auto regulation,This is needed to maintain efficient cerebral blood flow of oxygen and other metabolites, and withdraw of metabolic wastes from the brain. 
in order to analyze it to diagnose some neurological diseases  its sample is usually taken out in a process called lumbar  puncture.
 
        
             
        
        
        
The four major types of germs are bacteria, viruses, fungi, and protozoa. They can invade plants, animals, and people, and sometimes they can make us sick.