Answer:
Crossing over is the swapping of genetic material that occurs in the germ line. During the formation of egg and sperm cells, also known as meiosis, paired chromosomes from each parent align so that similar DNA sequences from the paired chromosomes cross over one another.
Explanation:
 
        
             
        
        
        
The right answer is d. sugar molecules move outside of the membrane.
The simple diffusion is the diffusion through the plasma membrane (in the direction of the strong concentrations towards the weak concentrations, until equilibrium concentrations on both sides of the membrane). In the case that we have, the most concentrated compartment in glucose (that is inside the cell) will let it escape and go to the extracellular compartments until reaching equal concentrations between the two compartments.
 
        
                    
             
        
        
        
The correct answer is A. A law
Explanation:
In science, a law describes a phenomenon or event that always occurs under specific circumstances, and therefore it is constant. Due to this, laws are created based on multiple experiments or observations that lead to the same result. Also, a law only describes a phenomenon but does not explain why this occurs, which belongs to scientific theories. 
The statement "traits are passed from parents to offspring independently of one another" by Mendel is a law because it describes a proven and constant phenomenon in genetics. Also, this is the result of the multiple experiments made by Mendel that showed the same result in terms of genetics. 
 
        
             
        
        
        
<span><u>"Removing food, dirt, and debris from the surface"</u> is one of the two definitions of cleaning
Cleaning has two objectives:
* Cleaning the surface from food, grease, debris, and any kind of dirt.
* Eliminating microorganisms, by eliminating them directly using antiseptics, or privatizing them from the grease and the nutrient found in the food and debris. so the two definitions are very close.</span>