The answer is the fourth one: Decrease in the fertility of the soil. If you just do crop rotation (harvesting a crop then planting the same type on the same soil) for many years, the soil just loses fertility because of so many of the same plants just using and depleting the fertility from the soil, making the soil less nutritious for the crops.
Explanation:
A flea and dog are an example of parasitism, because the flea irritates the dog's skin and feeds on its blood.
In a parasitic interaction, one organism benefits whereby the other one harmed. It is a positive - negative relationship. This interaction involves the interaction between the host and the parasite. The host is the bigger organism, here, the dog that is being harmed. The parasite is the flea causing the harm and benefiting from the relationship.
Certain bacteria live in the digestive tract of humans, and their relationship is an example of because mutualism the bacteria help humans to break down the food they eat.
In mutualism, the interaction is based on both organism deriving benefit from one another. Here, the bacteria gets its nourishment by breaking down human food. Human beings are able to digest the food better and are also nourished. A win-win situation is established.
Cattle egrets eat insects off the back of an elephant, which is an example of commensalism because the cattle egrets benefit without either harming or helping the elephants.
This relationship is known as commensalism in which one organism derives benefit. The other one derives no benefit and it is also not harmed in the process. The egrets feeds on the insects that are not harming the cattle.
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Answer:
hey!
I think your answer is
They dvelop from 2 separate eggs
Fraternal twins each come from their own egg and sperm. The term for this is dizygotic , while identical twins are monozygotic.
Explanation:
hope this helps
Answer:
i think it should be a little bit light
Explanation:
Well part of the water cycle is evaporation which come from heat which you get from the sun. When the water evaporates it goes into clouds so then it can rain.
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