Answer:
<em>The correct option is d) once the electrical impulse reaches a certain level of intensity (its threshold), it fires and moves all the way down the axon without losing any intensity.</em>
Explanation:
In the field of biology, the all-or-nothing law can be described as a principle which focuses on the strength with which a nerve or muscle fibre responds to a particular stimulus, this strength being independent of the strength of the stimulus. The functioning of the impulse is just like the trigger of a gun. The more the force of a stimulus, the more will be the intensity of the nerve impulse.
Edwin Hubble used the Doppler effect to determine that the universe is expanding. After years of scientific research and observation of different celestial bodies through a telescope, Hubble found that the light from distant galaxies was shifted towards the red end of the spectrum. This red shift indicates that stars are moving away from us and from each other. This phenomenon is called the 'expansion of the universe', also known as the big band theory.
Answer:
<em>B</em><em>.</em><em> </em><em>I</em><em>t</em><em> </em><em>i</em><em>s</em><em> </em><em>g</em><em>o</em><em>o</em><em>d</em><em> </em><em>s</em><em>o</em><em>l</em><em>u</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>b</em><em>e</em><em>c</em><em>a</em><em>u</em><em>s</em><em>e</em><em> </em><em>p</em><em>e</em><em>o</em><em>p</em><em>l</em><em>e</em><em> </em><em>w</em><em>i</em><em>l</em><em>l</em><em> </em><em>h</em><em>a</em><em>v</em><em>e</em><em> </em><em>s</em><em>a</em><em>n</em><em>d</em><em> </em><em>t</em><em>o</em><em> </em><em>w</em><em>a</em><em>l</em><em>k</em><em> </em><em>o</em><em>n</em><em> </em><em>a</em><em>l</em><em>o</em><em>n</em><em>g</em><em> </em><em>t</em><em>h</em><em>e</em><em> </em><em>b</em><em>e</em><em>a</em><em>c</em><em>h</em><em>.</em>
Answer: synthesis of DNA from an RNA template
