Answer:
winter
Explanation:
On this image, we can see the Earth being tilted away by 23.5 degrees from the Sun. This tilting puts the Northern Hemisphere in a situation where it is the one that is tilted away from the Sun, thus it will receive less sunlight, as well as less direct sunlight. That will cause lower temperatures on the Northern Hemisphere, thus the winter season will start, and it will last for around three months, at least at the mid-latitude zones. On the other side, the Southern Hemisphere is more exposed to the Sun during this tilting, so t receives more sunlight, and more direct sunlight, resulting in summer in this half of the planet.
 
        
                    
             
        
        
        
Adenine and something that starts with a G
        
             
        
        
        
I believe it's D. Tell me if I am wrong. 
        
             
        
        
        
An example of <span>nonsubstituted alkane that can exist as one of only two isomers is Butane with molecular formula </span>

<span>.</span> 
Isomers are those having the same molecular formula but different chemical structure.
Non-substituted alkane means it is not substituted by any other atom.It has only carbon and hydrogen atoms attached to it.
 
        
        
        
Answer: c. polar bear
Ursus maritimus is the scientific name for polar bear.The polar bears are found in the tundra biome. Tundra is the coldest and driest biome on earth. It is found in the Greenland, coastal zones of the Artic and Alaska, northern Canada and northern Russia. It receives very little rainfall. It exhibit long, winters and short summers. Polar bears are animals that are suitable to survive in the harsh climatic conditions of tundra biome. They are adapted to survive in freezing snow, exhibiting in tundra biome. They are large terrestrial mammals. They have thick insulated fur, which covers warm fat layers. Fur is also present in the bottom of the paws, which protect against cold surfaces and provides good grip on ice surface. The bear white coat camouflage the snow, useful to hide and hunt of pray in snow in winter month but not helpful in summers.