Double fertilization happens when one sperm cell wires with the egg to create a zygote, and the other sperm cell wires with the two polar cores to make the endosperm. 
To answer the above:
Once double fertilization occurs in plants, the zygote is diploid and the endosperm is <span>triploid.</span>
        
             
        
        
        
It's b, population total versus number of organisms per unit of area.
        
                    
             
        
        
        
I believe the correct answer from the choices listed above is the second option. It is the genes that is responsible for passing albinism from a parent organism to its offspring. Genes are what you get from your parents, proteins are what you get from eating meat, codons are basically the stuff in genetic codes and base pairs make up your DNA.
        
                    
             
        
        
        
According to the research, autopsy results from people who have died of fatal familial insomnia show evidence of degeneration in the thalamus.
<h3>What is fatal familial insomnia?</h3>
It is an autosomal hereditary disease that prevents falling asleep, that is, it is an absolute inability to fall asleep or to do so in an extremely superficial way.
Its onset is abrupt and continues to progress until it causes the death of the patient and its main neuropathological manifestation is degeneration of the thalamus, which is responsible for sleep.
Therefore, we can conclude that according to the research, autopsy results from people who have died of fatal familial insomnia show evidence of degeneration in the thalamus.
Learn more about fatal familial insomnia here: brainly.com/question/6430359
#SPJ1
 
        
             
        
        
        
Answer:
7 - sun
8 - its energy requirements are unbelievably, terribly high
9 - fission
10 - radioactive waste material, for example from the use or reprocessing of nuclear fuel.
11 - The Nuclear Regulatory Commission licenses and regulates civilian use of nuclear energy to protect public health and safety and the environment
12 - ?
13 - ?