Answer:
A single gene on the Y chromosome plays a crucial role in the parental development of the testes. 
Explanation:
Y chromosome is present only in males and this chromosomes is the distinguishing factor which separates males from females. It is the smallest chromosome but of utmost importance due to its sex determining feature. Up till now, studies show that Y chromosomes only carry limited amount of genes.  
The Y chromosome, most importantly, comprises of the SRY gene. This is the gene responsible for determining the testis and for the development of the testis. The SRY gene is responsible for sex determination. 
 
        
             
        
        
        
The kingdoms<span> in the </span>domain Eukarya<span> are the following:
1.) Protista
2.) Fungi
3.) Plantae 
4.) Animalia.
Hope this helps!</span>
        
             
        
        
        
Answer:
A
Explanation:
The energy carried by electromagnetic waves is sometimes referred to as radiant energy. Electromagnetic waves do not require a medium for propagation hence they can travel through vacuum and are known to transmit enormous amount of energy.
Electromagnetic waves transmit energy away from the source of the wave. Hence the answer chosen in the answer section above.
 
        
             
        
        
        
Answer:
The correct answer is : state - dependent memory.
Explanation:
State dependent memories are recollections of memories that are set off or enhanced or increased by an individual's present mind-set in view of the relationship to memories framed when you were in a comparative state.
For example, pleasant memories are all the more effectively or strongly recalled when one is feeling happy and the equivalent goes for negative thoughts and sadness or outrage towards something. In this case Joe having more negative thoughts in response of depression or negative thoughts.
Thus, the correct answer is : state - dependent memory.