There is a valve at the meeting point between each ureter and the bladder prevents the back flow of urine from the urinary bladder to the kidney
Answer: No
Explanation: It is beneficial if the animals that are disadvantageous doesn't reproduce so it doesn't discredit natural selection. The traits in which variation is occured are more suitable for organism to live and reproduce in the environment are preserved and are passed from generation to generation.
However, natural selection effects limited number of progeny.
Answer:
Five involuntary movements are- Beating of heart, Breathing, digestion, eye re-flexion, salivation.
Explanation:
Involuntary movements can be described as uncontrolled movements of the body parts on which one has no control over.
Answer:
Earthquake
Explanation:
Due to the fiction build up which will cause the earth to quake upon the release of said tension
