<span>Collin often experiences a "runner's high" during his daily three-mile run. this is most likely produced by endorphins.
Endorphins are related to a group of hormones which are secreted within the brain and the nervous system, it is like morphine chemicals which are produced. It is mostly produced when you exercise a lot, run high or stress etc.</span>
Answer: a star expels most of its outer material until only the hot core remains, which then settles down to become a young a white dwarf
Explanation:
Answer:
The correct answer is <em>c. animal wastes and fertilizers. </em>
Explanation:
Two major sources of nitrate pollution are farming and breeding activities. There are also certain industrial activities involved in nitrate pollution, but in general, these industries are related to agriculture.
The indiscriminate use of fertilizers for several years in intensive productions produce high nitrate concentration in soil and consequently elevate the risk of nitrate lixiviation.
Breeding animals produce nitrate pollution by their wastes, which accumulate and are not treated. These wastes include flesh, hair, feathers, skin, fat, liquids, excrements, among others. These wastes are an important source of nitrate.
In many cases, animal wastes are used by farmers as organic matter to improve their production. But excessive and incorrect use of it might produce severe damage in water sources.
Answer:
In India, in West Bengal, the shrimp found in a particular river were not deemed healthy to be eaten.
Explanation:
All water bodies have their own <em>food chains and ecosystems</em>. So basically in aquatic ecosystems, lot of marine animals are considered edible. The examples are fish, shrimp, prawn, lobster, crabs , etc are cooked and eaten.
Larger fish have a tendency to eat smaller fish. Anything that the smaller fish eats goes into the stomach of the larger fish and gets <em>accumulated</em>. Due to large industries not dumping their waste properly, lot of it falls into the water bodies. The waste contains toxic minerals like lead and mercury which when eaten by humans can cause poisoning.
Lead poisoning can cause loose motions, vomiting, cramps and infection in the abdomen etc.
