Answer:
Asexual reproduction yields genetically-identical organisms because an individual reproduces without another. In sexual reproduction, the genetic material of two individuals from the same species combines to produce genetically-different offspring; this ensures mixing of the gene pool of the species.
Answer:
78.09% nitrogen
20.95%oxygen
0.03%carbon dioxide
0.93%other gases
this is the composition of air
it is essential for respiration
Explanation:
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Answer:
Anxiety
Explanation:
Anxiety is the feeling of anticipation of some future threat. It is very associated with fear and generates feelings of tension. It is important to note that anxiety is an emotional response brought on by fear. But the classic fear, the one that we feel when we get scared of a movie, for example, is something momentary that happens when we identify some danger. With anxiety is different; it is a constant sense of fear about the future, a fear that something might happen. Because of this, this psychic state does not cease easily as it cannot escape from what is causing it. For people with this condition, many common situations would cause extreme stress, physical and psychological tension.
Delta is a type of fibre that transmits signals that are interpreted and perceived as pain.
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Delta fibres</h3>
A delta fibres (also known as A fibres) are a type of sensory fibre. They respond to cold and pressure stimuli, and as nociceptors, their stimulation is perceived as fast/first pain input. Because they are thinly myelinated, they transmit impulses quicker than unmyelinated C fibres but slower than other, thicker myelinated "A" class fibres.
Structure
They have myelinated axons that are thin (2 to 5 m in diameter) and have a moderate conduction velocity, or speed at which a nerve signal moves (2 to 30 m/s). These nerve fibres make up the afferent portion of the reflex arc that causes the body to "draw away" from noxious stimuli because they are linked to acute (sharp) pain (e.g. retracting your hand away from a hot stove). A part of A fibres is also linked to pressure and temperature perception (also known as "cold receptors" in mammals). Contrarily, slow-conducting, unmyelinated C fibres convey gradual, scorching pain.
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