Animals need other organisms to survive and plants only need sunlight and water
Answer and Explanation:
During an experiment, data from an experimental group are compared with the data of a control group. These two sets are identical in all aspects except for the independent variable that the researcher changes in the experimental group to observe how they affect the individuals. This variable keeps constant in the control group.
The experimental group is the one that receives the experimental procedure, with changes in the independent variable. There can be several experimental groups.
In the control group, the variable measured keeps constant, not influencing the results. This isolates the effect of the independent variable on the experiment and helps to find alternative explanations to the different results.
In the exposed example:
- Control group: Certain amounts of fishes exposed to a normal number of light hours per day. For example, if under natural conditions in its original environment the species is exposed to 12 hour light, then the control group should be exposed constantly to 12 hours light a day to maintain its normal reproductive levels.
- Experimental group: Certain amounts of fishes, equal to the control group, exposed to a different number of light hours per day. For example, there might be 5 experimental groups: one of them exposed to 4 hours light, a second group exposed to 8 hours light, the third group exposed to 12 hours light (The same as the control group), the fourth group exposed to 16 hours light, and the fifth group exposed to 20 hours light.
Except for light, the rest of the variables should be the same for all the groups.
A diverse range of clinical syndromes with a shared anatomic location inside the basal ganglia are known as basal ganglia disorders.
<h3>What is functional anatomy of basal ganglia disorders model ?</h3>
A model in which particular types of basal ganglia disorders are associated with changes in the function of subpopulations of striatal projection neurons. This model aims to explain the variety of clinical manifestations associated with insults to various parts of the basal ganglia.
- This model is based on an analysis of post-mortem anatomical and neurochemical data from humans and experimental animals. The excess of aberrant movements that characterise hyperkinetic diseases are thought to be caused by a specific dysfunction of striatal neurons that project to the lateral globus pallidus.
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The correct option is ANALOGOUS STRUCTURES.
Analogous structures are structures that are similar because of the functions they carry out and because of their external appearance. But these structures are different internally.<span />
The neutral theory of molecular evolution proposed that most evolutionary changes are the result of the fixation of neutral mutations by genetic drift. Hence, in this model, most genetic changes in a population are the result of constant mutation pressure and genetic drift.
