Your answer is D lives in the same region as others closely related species. Because it wouldn't be C cause that's not isolation it would be B cause there not plants and its not A because it is reproductive but its not isolation.
The correct answer is option (A) Variation in the strawberry plants.
When the effect of fertilizer on the growth of two strawberry plants is tested, unavoidable source of experimental error is the variation in the strawberry plants. Variation refers to the deviation or differences from the normal plant which can be due to genetic variation. It is due to change in the DNA sequence. If any one of the two plants being tested show variation, the rate of metabolism differs and changes the growth pattern of the plant. The rate of absorption of water and nutrients is effected which brings change in the growth of the plant and causes an error in the experiment and the result.
The answer for the given question above would be option A. Micturition is another term for urination. Urination is the act of passing urine which is a reflex phenomenon. <span>As urine accumulates in the bladder, the stretch receptors then are activated and the stimulus is being passed to the spinal cord, then to the brain. In the absence of stretch receptors, the urine would would be accumulated and would probably enlarge.</span>
