Point source means: the pollution that comes from a single point (examples)
Sewage pipes releasing sewage into a ditch
Smokestack style factory chimneys
Oil pipes
Pollution which is caused by rain fall or snow melting into the ground. As the runoff moves, it picks up and carries away natural and human made pollutants, Finally reaching a lake, river, ocean, groundwater.
Metastasis will happen and cancer cells invade nearby healthy cells, tissues, lymph nodes, organs or will migrate to distant organs.
The two different types of stem cells broadly classified as are Embryonic stem cells and adult stem cells. Embryonic stem cells are obtained from the blastocyst layer of the embryo and are pleuripotent. Whereas adult stem cells are the undifferentiated cells from tissues of an adult or a child. They can be unipotent or multipotent.
Explanation:
Cancer cells migrate to other parts of the body via blood and lymphatic system. This is called as metastasis. Cancer cells when becomes tumour they develop their own blood vessels and obtain nutrients from them. Once the tumour gets big it pushes the normal healthy cells of the neighbouring tissues and keeps on spreading.
Stem cells obtained from the embryo can differentiate into any types of cell and when grown in-vitro can dramatically form the three germ layers.
The adult embryo cells are found in less quantity, their role is to repair the tissue they reside in.
Dragonflies are most closely related to damselflies. Damselflies are smaller, slimmer, and most of them fold their wings along their body when they are resting.
The correct answer is Naltrexone.
Disease: Kleptomania & Symptoms
It is an unusual condition disorder in which a person has an urge to steal the things even if they don't need it. This is a type of impulsive disorder which is characterized by repeating and continuous patterns of stealing.
Treatment
Naltrexone is a drug that cures this disease, this drug blocks the effect of endogenous opitates that may be released during stealing. In layman language one can say that it blocks that part of he brain which feels pleasure with some of the addictive behaviors. It was found that after eight weeks of treatment by this medicine, the urge to steal things was reduced.
Answer:
B. The animals at each level use energy, so only a small amount of their energy is available to the next level.
Explanation:
