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lutik1710 [3]
4 years ago
5

What is the malthusian limit​

Biology
1 answer:
ki77a [65]4 years ago
7 0
Answer:


A hypothetical limit on human population espoused by English theologian and scholar Thomas Robert Malthus in his 1798 Essay on the Principle of Population. Malthus believed that humans would eventually reproduce in such excess that they would surpass the limits of food supplies; once they reached this point, some sort of "catastrophe” was inevitable to control the population and human resources.
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Whats the parts of the microscope
jek_recluse [69]

Parts of the microscope are:

1. Eyepiece or ocular. This what you look through at the top of the microscope.

2. Eyepiece tube. Holds the eyepiece in place

3. Objective lens.  The primary optical lenses on a microscope ranging from 4x to 100x magnification power.

4. Nosepiece. Houses the objective.

5. Coarse and fine focus knobs. They are used to focus the microscope.

6. Stage. This is a ledge where the specimen to be observed is placed.

7. Stage clips. Clips on the stage that hold e.g.  a glass slide on which the specimen has been mounted.

8.Aperture. The hole in the stage through which transmitted light from the base reaches a specimen placed on the stage for observation.

9. Illuminator. This is the light source for a microscope usually located in the base of the microscope.

10. Condensor. Is used to collect and focus the light from the illuminator on to the specimen. It is located immediately under the stage.

11. Iris diaphragm. This is a flexible structure that controls the amount of light reaching the specimen and is located above the condenser and below the stage.

12. Condensor focus knob. Moves the condenser up and down to control the light focus on the specimen.

13. Base. This is the foot of the microscope and supports the whole frame of the microscope.



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