To identify people by DNA it is better to make copies of non-coding segments because they exhibit more variation than genes.
- The polymorphic sequences of non-coding DNA vary between individuals in humans.
- Variable number tandem repeats, or VNTRs, are created when DNA sequences are repeatedly replicated in the genome's non-coding regions.
- It is possible to create a person's genetic fingerprint by counting the amount of repeats, which varies between individuals.
- However, this non-coding DNA is used in criminal investigations by forensic experts.
- There are distinctive repeating patterns found inside this area of DNA that can be utilized to distinguish one person from another.
- Short tandem repeats (STRs) are a type of pattern that can be measured to determine a person's DNA profile.
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If these animals are found in a river, it shows that the river is clean. However, some animals are adapted for surviving in polluted conditions and can survive in low oxygen concentrations. Examples are blood worms and sludge worms. The presence of these species indicates there is a high level of water pollution.
A tide just after the first or third quarters of the moon when there is least difference between high and low water
Answer:
A matured community has balanced energy flow,organic structures are diverse with greater diversity
Explanation:
The ecological successions composed of plants like herbs and shrubs,grass.The herbivores survive by eating plants as their main food. An ecosystem with abundant species population finally becomes a community. A fully matured community has greater diversity of species,organic structures and a balanced energy flow.The levels and principles in ecological succession is very significant to human beings.
