Answer:
Reproductive isolation is the very factor that causes the development of what we call "species" according to the biological species concept. The reason cats and dogs are different species is that they can't mate, so we call them "reproductively isolated."
I think it is a dipeptide.
Answer:
the correct sequence of the events happened during nerve impulse is (d): 2,1,4,3
Explanation:
Originally K+ ions remains inward the membranes while Na+ ions remains outward to maintain a resting potential of membrane.
Upon stimuli Sodium channels open on membrane and Na+ diffuses inward leading to the depolarization of membrane that is it becoming more positive due to Na+ and K+ ions.
To regain it polarized state or in repolarization state Potassium channels open and K+ begun to diffuse outward while Sodium channels gets closed and Na+ ions remains inside the membrane.
Potassium channels are not efficient as compared to Sodium Channels, so an excess amount of K+ion move outward so Hyperpolarization state achieved.
As the both ions are on the wrong side and will not be available for the next nerve impulse. Hence in Refractory period by the help of Na+/K+ pum, both ions move back to their original place and membrane achieve its resting membrane potential state.
This is an example of the Water Cycle.
Water returning to the Earth from the atmosphere would be precipitation
Transcription is initiated when the RNA Polymerase binds to promoter region and transcription is ended when RNA Polymerase binds to termination sequence.
Promoter consensus sequence is important as it is the ideal promoter sequence and is used to judge the promoter's strength. The consensus sequence can be different for different group.
Transcription is the process of forming mRNA from DNA for the purpose of protein synthesis. The initiation occurs when the polymerase binds the promoter and stops when binds the terminator sequence.
Promoter consensus sequence is a sequence that is ideal as promoter. It is a theoretical sequence and the sequence most close to it is considered to be better. We can find different consensus sequence.
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