Answer:
Sleep.
Awaken.
Explanation:
The time and duration of circadian rhythms are regulated by the interactions of PER(period) and TIM(timeless) genes and their proteins. The TIM proteins binds with PER- proteins and the two entered the cell nucleus to set up circadian rhythms.
At midday the two genes becomes active,and their DNAs transcribed to form PER-RNA, and TIM -RNA. These RNAs accumulated in the cell nucleus over some hours.
At dusk(night) the amount of these RNAs reached highest levels.and are translated to the PER and TIM -proteins, which bonded together and moved into the cells nucleus causing sleep in the animals.
Hours to dawn,(morning) the concentration of the two proteins exceeded their limit, and signals is sent to their genes to stop transcription, thus the protein(PER and TIM) synthesis is stopped.
At almost dawn, the PER and TIM proteins disintegrates, the cycle begins again and the individual is awake.
When temperature is increased, molecules come together more frequently and with greater energy. Because chemical reactions need a certain amount of energy to occur, increasing the energy of the molecules involved in the reaction can speed up the rate at which the reaction occurs.
The insects have an important role in the pollination of the flowering plants. The insects acts as a carrier of the pollen grains for different flowering plants.
Answer:
Because they represent the leftover building blocks of the solar system-scientists can study these and learn about the composition of the solar system.
There are many types of frogs thus there are a lot of scientific names also, such as Rana draytonii or Atelopus zeleki. But the common scientific name or order for frogs is called Anura.
