Answer:
The mechanism by which cells regulate their ability to respond to extracellular messengers is known as receptor signalling.
Explanation:
Cells senses an environment and communicate which each other through ligand-induced activation of signalling receptors at the cell surface. Signalling receptors enter the endocytic pathway and are sorts into various compartments. Endocytosis regulates cell signalling by controlling the number of receptors available for activation in plasma membrane and activation of receptors or downstream effectors often stimulate receptor endocytosis.
Answer:
C Darwin
Explanation:
Charles Darwin, the father of evolution theorised that within any population, there exists variation in traits which help the animals adapt to their environment and help them survive.
In the same vein, he believed that the breeds of dogs are all one species, but they have incredible genetic diversity.
Therefore, Charles Darwin first realized that variation mattered, even though he didn't know the exact mechanism.
The impact craters on the moon are created by collisions made by other asteroids many thousands of years ago
(c)Low Temperature of the Reactants can decrease the rate of a chemical reaction.
How temperature effects the rate of a chemical reaction
Chemical reactions typically occur faster at higher temperatures. Food can spoil quickly when left on the kitchen counter. However, the lower temperature inside of a refrigerator slows that process so that the same food remains fresh for days. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision.Thus decrease in the temperature of a reaction can help in decreasing the rate of a chemical reaction.Lower the temperature lower the chemical reaction rate.
to learn more about chemical, reactions, refer:
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Answer:
Sir Edward Burnett Tylor & Lewis Henry Morgan.
Explanation:
Anthropology may be defined as the field of science that mainly deals with the study of the human and its behavior. The evolutionary study of human is done in Anthropology.
Burnett Tylor & Lewis Henry Morgan gave the first theory on the anthropology. They explained the impact of the society on the behavior and evolution of organisms. According to them, the development of the society is based on the order of the culture and occurs at different rate. They explain the social evolution in anthropology.
Thus, the answer is Burnett Tylor & Lewis Henry Morgan.
