Answer: Option A
Explanation:
A tunicate is marine invertebrate animal  which is a part of chordates. They have notochords and dorsal nerve chord. The subphylum of the organism is called as Urochordata.
The adult urochordates lack notochord but the larval stage of the urochordates have notochord. This is because it helps in swimming of the organism which is required only at the larval stage.
The adult stage of the tunicates is sessile and they do not swim so they do not require notochord.
 
        
             
        
        
        
<u>Answer: </u>
Option(D)
Powder Alarm
<u>Explanation: </u>
The powder alarm was a considerably prominent reaction to the orders of General Gage, royal governor to the British soldiers to remove the gunpowders from the magazine. 
In response to this action, amid rumours that blood had been shed, alarm scattered to Connecticut and even beyond through the countryside, and American Patriots sprung into action, fearing that war was at hand.
 
        
             
        
        
        
It is Prophase.
Hoped this helped.
~Bob Ross®
        
             
        
        
        
Carbohydrate is the answer
        
             
        
        
        
Answer:
after the oocyte- estrogen levels consistently rise
Mature egg- the progesterone levels are high 
Between the ovary and corpus lutem- luteinizing hormone levels are high 
Explanation: