False, a lipid bilayer is a MOSTLY apolar cell structure,which means polar molecules can't easily go through it
        
             
        
        
        
Answer: The genotype for the parent organism whose genotype is unknown is Ff. 
Explanation: Let (F) represent the allele for purple which is dominant over (f) and (f) represent the allele for white.
The parent organism whose genotype is unknown is heterozygous for purple colour (Ff). 
A cross between Ff and ff will produce four offsprings: two of which are Ff (heterozygous for purple colour) and two are ff (white).
Ff x ff = Ff, Ff, ff and ff. 
Since (F) is dominant over (f), (Ff) will manifest as purple while (ff) will manifest as white. Therefore, half of the offsprings are purple while the other half are white.
See the attached punnet square for more information
 
        
             
        
        
        
According to Newton's second law of motion, 
acceleration= Net force divided by mass 
Net force of A=10N
Mass of A=10kg
F/M
=10N/10kg = 1 m/s2
Acceleration= 1m/s2
 
 
        
             
        
        
        
A kilogram is the standard SI base unit of mass which is equivalent to 1000 grams and aproximately 2.2 pounds.
Hope it helped,
BioTeacher101