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EleoNora [17]
3 years ago
7

Rachel Carson wrote about the delicate balance of organisms in a food web. Snakeheads, a freshwater fish that is not normally fo

und in the United States, was accidentally introduced to the Lake Eugene. As an adult, the Snakehead would feed on crustaceans, small fish, reptiles, and even small mammals. It would not have any predators in this environment. Considering the food web below how would this affect the ecosystem?

Biology
1 answer:
kirill [66]3 years ago
4 0
The snakehead could unreservedly eat little fish and scavangers, so that would evacuate/diminish the predator for zooplankton and phytoplankton. So zooplankton and phytoplankton populace would increment while little fish and scavanger populace would diminish. Presently if little fish and shellfish populace diminishes, their predators would have bring down sustenance, so vast fish pop. would diminish. On the off chance that vast fish pop. diminishes, their predators will have less nourishment thus the number of inhabitants in well evolved creatures will somewhat drop, however not by much, since they can feast upon zooplankton. 
So at last, just the phytoplankton populace would increment while everything else diminishes.
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Answer:

Lightly pigmented people tend to be at higher risk of vitamin D deficiency

Explanation:

BACKGROUND KNOWLEDGE:

Human skin is the largest organ of the body which makes boundary line between environment and internal conditions.  Human skin cell produces pigment called melanin when ever it is subjected to Sun. More the melanin pigment produced more will be the skin darkens. Ultraviolet (UV) radiations also come from Sun and responsible for more pigmentation.

ANSWER EXPLANATION:

According to the question darkly pigmentation only occurs when their is high level of UV radiations. High level of UV radiations are also responsible for Vitamin D production.

People with lightly pigmented means that there environment has low level of UV radiations which are the requirement of Vitamin D production. Hence due to low UV radiations peoples with light pigmentation's are also be at higher risk of vitamin D deficiency

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