" <span>A </span>Characteristic<span> refers to the distinctive </span>qualities<span> that make up an individual. A </span>trait, on the other hand, is a feature of an individual which is inherited. The main difference between<span> a </span>characteristic<span> and a </span>trait<span> is while a </span>characteristic<span> needs to be built by a person and absorbed, a </span>trait<span> comes genealogically."</span>
Answer:
If the environmental condition are suitable, the worms reproduce rapidly.
Explanation:
Environmental condition such as temperature, humidity, pH and texture of the soil has a great influence on the population of worms. If these environmental conditions are optimum, the worms reproduce rapidly and increase in population occurs. The population of worm increases because more worms start reproduction and reproduce baby worms. With the passage of time, these baby worms fully matured and start reproduction and increase the population of worms.
Answer: Contour ploughing
Explanation: The soil conservation can be defined as the techniques that are opted to conserve soil. It is necessary for the soil to be conserved as it is necessary for the growth of plants.
There are various methods that can be used to conserve soil. Contour ploughing is one of them. In this method furrows are made that move left to right to maintain a constant altitude.
This technique reduces the runoff which helps in the soil conservation.
The flow of energy in an aquatic ecosystem phytoplankton → zooplankton → fish → mammal.
<h3>What does the bottom-up model?</h3>
The bottom-up effect means that a lower trophic level in the biological network affects the community structure of higher trophic levels by means of resource restriction.
whereas the top-down effect refers to a higher trophic level that influences the community structure of a lower trophic level through predation.
Thus, opotion "B" is correct.
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