Answer: The fight-or-flight response is most clearly associated with the release of epinephrine into the bloodstream.
Any physiological reaction occurring due to something which frightens physically or mentally is fight-or-flight response. In order to produce the fight-or-flight response the hypothalamus activation of the adrenal cortical system and sympathetic nervous system takes place. On receiving the signal from hypothalamus the sympathetic nervous system makes the actions of body speed up or gets tensed and body is in an alert condition.
The impulses are sent by the sympathetic nervous system to the smooth muscles and also glands. As a response to it epinephrine or adrenaline and the norepinephrine or noradrenaline is released by the adrenal medulla in the bloodstream. These stress hormones thus bring about changes in the body such as increase in blood pressure and heart rate.
Generally the order is for materials of a single molecule
Gasses are the least dense
Liquids are in between
Solids are the most dense
as evident if you pour sand in a cup of water, the least dense air (gas) will float on top, and the most dense sand (solid) will sink to the bottom.
However, there are some exceptions,
example, water
ice happens to less dense than water but it is a solid, the molecules of water happen to structure themselves in a way that makes them take up more space than water molecules following around each other
<h2>Answer and Explantion</h2>
Asexual reproduction is a kind of reproduction by which children emerge from a single organism and obtain the genes of that origin only, the union of gametes is not included and nearly never varies the number of chromosomes. Asexual reproduction enables people that are genetically identical to the parent plant. Plants can produce seeds without fertilization by the process of apomixis, then the ovary emerges to new seeds. Plants and fungi proliferate asexually.
The energy in coal<span> comes from energy that was stored in giant plants that lived hundreds of millions of years ago in swamp forests, even before the dinosaurs! When these giant plants and ferns died, they </span>formed<span>layers at the bottom of the swamps. Water and dirt began to pile up on top of the dead plant remains.</span>
