Answer:
Potential energy is gaining all the way to the top of the hill due to the increase of height (gravitational pull) on the skateboarder. At the top of the hill potential energy will reach its highest point. Then going down kinetic energy increases as potential energy decreases.
Explanation:
B. The amount of sleep students received before the exam
The appropriate sequence of steps involved in recombinant DNA technology are as under :-
1) Selected gene is isolated.
2) Restriction enzymes cut DNA into fragments.
3) Fragments of DNA are inserted into a vector.
4) Vector and recombinant DNA multiply.
5) Recombinant DNA is inserted into host.
In the very first step, the desired gene/genetic material for cloning is isolated from the cell. To do this the cell is lysed. Cells can be lysed by sonication or using chemicals like detergents.
In the second step, isolated DNA/gene is cut with the help pf biological scalpels known as restriction enzymes. The vector (usually it is a plasmid) is also cut down using restriction enzymes.
In the third step, the fragment of the restriction digested DNA (gene) and the vector are ligated together.
In the fourth step, this vector in which desired gene has been incorporated is cloned to generate various copies.
In the last step, this recombinant DNA is inserted into a host cell where is expressed i.e. in host cell this desired gene produces its product (protein).
Answer:
Answer is 3%.
Explanation:
Major depression as explained in the text is a type of depression that last for a longer period of time.
This type of depression is usually seen in the adults , especially in the people within 40-59 age bracket.
This is because, at that age bracket or range , people have the notion to have gathered a reasonable amount of notable achievements in life, ranging from being married with children , to having personal house, cars, business, and many others. And when some or none have been achieved, it brings depression.
Teenagers do not think about the things mentioned above , because they have parents that will provide them, and, because they haven't reach the stage.
Some of the symptoms of depression in adults are
* feeling hopeless or empty
* feeling sad
* change in appetite.
* feeling helpless and restless.
* trouble with concentration.