Answer:
the ureter.
Explanation:
<u>Urine leave collecting duct of many nephrons of kidney and flow into ureters. Ureters are the two tubes which drain the urine from kidneys to urinary bladder.
</u>
Each ureter is muscular tube which drains into bladder.
<u>Small spurts of urine is being sent to the urinary bladder by the smooth contraction of the muscle which are present in the well of ureters.</u>
In urinary bladder, the urine is store without being eliminated from the body.
The correct option is HYPOTHESIS.
An hypothesis refers to an explanation, that is proposed and which is temporarily accepted in order to investigate an observed phenomenon. Sometimes it is described as educated guess.
Scientific hypothesis is the first step that is always taken by scientists during the course of scientific investigation and it serves as the basis on which the scientific investigation is based. A hypothesis must be testable and the explanation offered abut it must be based on prior scientific knowledge.
The correct answer will be A;
A) The number of protons in the nucleus does not equal the number of neutrons.
A=mass number:
Z=atomic number (= number of protons)
N=number of neutrons:
A=Z+N
If the number of protons in the nucleus is equal the number of neutrons , we would have an even mass number; because Z=N=x; then A=x+x=2x (this is always an even number) but 23 is an odd number, therefore the number of protons in the nucleus does not equal the number of neutrons.
