Answer:
In the covalent bond between oxygen and hydrogen, the oxygen atom attracts electrons a bit more strongly than the hydrogen atoms. The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
Hope it helps!
 
        
                    
             
        
        
        
Answer:
A. Sensation
Explanation:
- <em>A sensation</em> is a mental process (like hearing, seeing or smelling) resulting from the immediate external stimulation of a sense organ often as distinguished from a conscious awareness of the sensory process, it's a physical feeling or perception resulting from something that happens to or come into contact with the body. Considering the example given the freshly cut grass, gentle breeze and sound of children laughing are the physical feelings stimulating your nose, skin, and ears.
- <em>Selective attention</em> is focusing on a particular object in the environment for a certain period, in your example, the subject is not specifically focusing on one thing at the time.
- <em>Sensory adaption</em> is the reduction in sensitivity to a stimulus after constant exposure to it, in this case, the subject is nos experiencing awareness of a constant stimulus.
- <em>Cognition</em> is the process of acquiring knowledge and understanding through thought, experience, and the senses. In your example, the data obtained by the subject is still not processed. 
I hope you find this information useful and interesting! Good luck!
 
        
             
        
        
        
Human skulls is mainly Bone structure an immovable joint
        
             
        
        
        
Answer:
Lysosomes are vesicles that create and transport enzymes to the endoplasmic reticulum. The rough endoplasmic reticulum synthesizes the enzymes. Also, ribosomes synthesize proteins.
Explanation:
 
        
             
        
        
        
Sexual selection example; The brightness of the feathers of a peacock. You may also see similar traits in other birds, where some dance and show off bright feathers to attract a mate, where other build nests. These specific traits do not increase their chance of survival, and are not learned. They increase their fitness because they increase their chances of reproduction and passing on their genes. 
Survival of the fittest = Survival of those who survive, and reproduce