I believe it’s geosphere and biosphere
Answer:
Turn the revolving turret (2) so that the lowest power objective lens (eg. 4x) is clicked into position.
Place the microscope slide on the stage (6) and fasten it with the stage clips.
Look at the objective lens (3) and the stage from the side and turn the focus knob (4) so the stage moves upward. Move it up as far as it will go without letting the objective touch the coverslip.
Look through the eyepiece (1) and move the focus knob until the image comes into focus.
Adjust the condenser (7) and light intensity for the greatest amount of light.
Move the microscope slide around until the sample is in the centre of the field of view (what you see).
Use the focus knob (4) to place the sample into focus and readjust the condenser (7) and light intensity for the clearest image (with low power objectives you might need to reduce the light intensity or shut the condenser).
When you have a clear image of your sample with the lowest power objective, you can change to the next objective lenses. You might need to readjust the sample into focus and/or readjust the condenser and light intensity. If you cannot focus on your specimen, repeat steps 3 through 5 with the higher power objective lens in place. Do not let the objective lens touch the slide!
When finished, lower the stage, click the low power lens into position and remove the slide.
Explanation:
In the grassland ecosystem, the largest number is of producer in the population.
The ecological pyramid of number is the relationship between the number population at each tropic level, it says about number of producers, and consumer. In the grassland ecosystem the vegetation is dominated by plants and grasses.
In the grassland ecosystem, the number producers or plants which is highest is followed by herbivores (mice), which is followed by secondary consumer (snake) and then tertiary carnivores (eagle) . So that, the upper level of trophic level decreases in number. Hence, in grassland ecosystem, the pyramid of number is upright.
To learn more about ecological pyramid here
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Answer:
Median height is selected
Explanation:
Stabilizing selection is a particular type of natural selection where the mean of the trait in the population stabilizes on non-extreme phenotypes, thereby favoring intermediate phenotypic variants. At genetic level, stabilizing selection is shaped by selective forces that push the distribution of the trait in the population toward the average (median trait), it is a condition that may happen when a population is completely adapted to its environment. Thus, stabilizing selection acts to purge the extreme phenotypic variants via purifying selection. Stabilizing selection is considered to be one of the most important mechanisms controlling the distribution of different phenotypes after many cycles of artificial selection, it s for that reason that breeders believe that this type of natural selection is the most common in nature.
It is called making a PREDICTION.
Prediction refers to an act of forecasting about a particular matter. In scientific investigation, to predict means you are explaining what is going to be the likely results of the experiment which you are about to carry out. Your prediction might be wrong or right.<span />