Answer:
Parasympathetic nervous system
Explanation:
Parasympathetic nervous system (PNS) along with sympathetic nervous system (SNS) makes autonomic nervous system (ANS). ANS controls the functioning of internal processes like digestion rate, heart rate, respiratory rate etc. During a threat or stressful situation SNS is activated. It increases heart rate, respiratory rate and directs blood flow towards peripheral muscles as a part of "fight or flight response". When the situation becomes normal, PNS is activated which restores all the vitals as a part of "rest and digest" mechanism.
Since here Byron almost got into an accident, he was scared a lot due to which his SNS was activated. Eventually when he realized that he is out of danger, his PNS got activated which returned his heart rate and blood pressure to normal levels.
The answer is A) air temperature.
Answer:
constitutive mutations
Explanation:
Constitutive mutations -
They are the strains which uninterruptedly make proteins , and therefore , can lead to excess of protiens and the process is very difficult or nearly impossible to stop , is known as the process of Constitutive mutations .
One of the example of this process of Constitutive mutations is ,
The strain with lac operon mutation which can even results in th etranscription of the lac genes .
Hence , from the statement of the question ,the correct term is Constitutive mutations .
Answer:
In biology, homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits.
Explanation:
A) The colour of a metal is often obtained by the wavelength distribution scale (which is explained below). The radiation of light which the metal fails to absorb, gets reflected. So, the unabsorbed light which is reflected back is visible to us. Hence, we see the color of a metal.
b) A transparent colour of non metal is seen by us, because of the radiant incident ray of light is unabsorbed by the material and is transmitted through it. So, in this case there is no absorption or reflection taking place and hence there is no colour observed.
The colour of any element usually comes from the electron charge transfer between the lower energy to higher energy level by absorption of the ray of light.
Also there are other reasons too, as in organic compounds, the colour is obtained by hyper conjugation which means there is less gap between the higher molecular orbital and lower molecular orbital. So, the absorption of light takes place in these compounds.
The other reason for absorption of light and imparting colours into its substrate is because of the Wavelength distribution. On the wavelength scale, the wavelength of colour that is absorbed is never seen as the same to us, instead we see the complementary colour of it. Example, if we see a red colour, then the colour absorbed by the substrate should be blue.
