The drug can be laced and made poorly. You never know what is put inside of it because it is not a law in the U.S. to tell your buyer what is put inside of it unless they ask. Also sellers of ecstasy usually are not selling what they tell you. Most of the time they are selling you MDMA.
This is heavily disputed, and honestly, it varies on a person-by-person basis. Some people are visual learners (so it's effective for them to use videos and pictures to help them study), some prefer being hands-on, etc...
Generally though, I'd say the most effective method that works for most people is through visceralisation. This is the process of associating concepts, words. phrases etc. with your different senses (sound, touch, images...). You can read up more on it by searching up "visceralisation for studying".
Water, vitamins, minerals, and linoleic acid are nutrients the body cannot manufacture or produce in sufficient amounts and thus are referred to as essential nutrients.
The human body needs nutrients to perform its various functions. A nutrient is a substance that enables the body to grow, survive and reproduce. These nutrients are not always synthesized by the body but are taken from the diet. The diet we eat should be balanced and have adequate amounts of nutrients like vitamins, minerals, fats, etc.
Essential nutrients are those nutrients that cannot be processed by the body and thus are required to be consumed through the diet. Vitamins, minerals, fats, proteins, water, and carbohydrates are six essential nutrients.
To know more about essential nutrients, refer to the following link:
brainly.com/question/13047915
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DNA helps scientists to better classify organisms is because each organ has a specific kind of DNA. For an example, brains and hearts have many small types of RNA. So if a scientists see some RNA they know that its a heart or a brain.
