Element. an element is when a substance only contains one type of atom. compound is made of 2 or more
The answer is B. Geology has shown a thin layer of iridium (a rare mineral on earth but found on asteroids and meteors) in the rock layers between the Cretaceous and Paleogene periods. Below this layer are numerous fossils of pterosaurs and dinosaurs, but above the layer are drastically few. The aftermath of asteroid impact is believed to have smothered most vegetation from earth which dinosaurs depended on as a source of food.
The neurotransmitters that are partially responsible for the "high" that is associated with passionate love are chemically similar to the drugs, amphetamines.
- The neurotransmitters responsible for passionate love are dopamine, norepinephrine, and serotonin which show similar effects as shown by amphetamines.
- Amphetamines are drugs given to patients to help them deal with mental illnesses like insomnia and depression.
- Passionate love gives the same feelings as taking drugs such as amphetamines.
Thus, the neurotransmitters that are partially responsible for the "high" that is associated with passionate love are chemically similar to the drugs, amphetamines.
Learn more about neurotransmitters here: brainly.com/question/26387085
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Answer:
D) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.
Explanation:
- Gene therapy is a technique for correcting defective genes genes by the insertion, alteration or removal of genes within an individual's cells and biological tissues to treat disease.
- Although gene therapy is considered as a potential method of treating several diseases but till now a little progress has been seen in this field.
- Several controversial points include, short lived nature of gene therapy, immune response , problems arising due to viral vectors and possible multigene disorder.
- There arefew ethical considerations that are to be kept in mind while using gene therapy like deciding what is disability and what is disorder, does searching for a cure demean the lives of individual, the preliminary attempts of gene therapy is very costly etc.
<span>They bounce off each other and then they stop.</span>
