Answer: The correct answer for the blank is-
a. support the multiregional model.
Multiregional model is a scientific model that provides explanataion of pattern of evolution of modern humans. It is an alternative explanation of Out of Africa model.
According to this model, modern humans that are present around the world (that in various regions or multiregions of the world) show similarity to the Homo erectus found in Africa.
In other words, species of human beings first originated in Africa as Homo erectus, which then underwent subsequent human evolution upon dispersing in various regions around the world. These species include all archaic forms of human like Homo erectus, Neanderthals, and evolved worldwide as Homo sapiens ( modern human forms).
Thus, option a) is the right answer.
A concentration gradient is the process of particles or solutes moving through a solution from areas of greater particle concentration to areas of low particle concentration.
The importance of a concentration gradient is that it is what makes osmosis and diffusion to happen. If there were no gradient, there would be no movement of anything from high to low concentrations. Because cells are either hypertonic or hypotonic, nutrients and materials are able to flow either in or out of the cell and life is sustained. If all cells were isotonic, then there would be no flow of nutrients and materials and cells would not survive.
Organisms capture energy from the environment.
Organisms acquire energy from hydrolysis.
Organisms acquire energy from the temperature of the Earth.
Answer;
Organisms capture energy from the environment.
Explanation;
-Organisms Capture & Store Free Energy for Use in Biological Processes.
Autotrophs capture free energy from physical sources in the environment.
-Photosynthetic organisms capture free energy present in sunlight.
-Chemosynthetic organisms capture free energy from small inorganic molecules present in their environment, and this process can occur in the absence of oxygen.
Heterotrophs capture free energy present in carbon compounds produced by other organisms.
-Heterotrophs may metabolize carbohydrates, lipids, and proteins by hydrolysis as sources of free energy.
-Fermentation produces organic molecules, including alcohol and lactic acid, and occurs in the absence of oxygen.
b. It is an electric discharge between two similarly charged surfaces.
c. It is caused by the rapid expansion of air along an electrical strike.
d. It always begins in a cloud and strikes the Earth.
Answer:
the answer is A. it is one of the most dangerous parts of a thunderstorm.
Explanation:
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