The events that are most likely to be considered a normative age-graded influence on development are marriage and retirement
<h3>What is a normative age-graded influence on development?</h3>
This refers to the various things that cause changes in the lifestyle of a person and can be biological or environmental.
Hence, we can see that when a person gets married, he undergoes a normative age-graded change as his lifestyle and habits change, the same thing happens when someone retires.
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Answer: "TRUE" .
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Sites within the human genome where a short nucleotide sequence is repeated many times in a row are known as short tandem repeats.
DNA sequences with 2 to 6 base pairs are known as short tandem repeats (STRs), and they are dispersed throughout the genome. Multiple repetitions of these brief sequences are possible, and the number of repetitions varies greatly between people. The capacity to distinguish one sample from another is made possible by the great variability.
The Y-STR method's primary benefit is its capacity to identify the male component even in severe male-to-female DNA mixes. The number of semen donors for combinations of two or more male persons can be determined using it, as well as for quickly screening a large number of stains.
Due to their occasionally poor biostatistical efficiency and the potential to detect one or more genetic discrepancies that might potentially be explained by mutational events, STRs have a few drawbacks when examining genetic links in deficient cases.
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Answer: It's an EXPERIMENT
Explanation: Experiment is done when we apply anything to a samples or conditions in other to study another sample or conditions.
Observation is done when, we study samples or conditions in it's natural way, without application of anything that may alter it's result.
Because the researcher has applied fertilizer to one side and did not apply to the other side, that means he has performed an experiment. Since he wasn't observing the two sample in it's natural way without any external application.