Cells and System. Moose, Harshil , Harsh and Darsh. Common Characteristics of Living Things. Living organisms come in all shapes and sizes and although they look different, they have many characteristics that are common. Some of the common characteristics of living organisms are:
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Moose, Harshil, Harsh and Darsh
The Eyepiece is the top part of the microscope; it is the lens you look through to see your specimen.
It’s the large metal band attaching the base to the lens and eyepiece.
3) Fine Adjustment Knob:
The smaller round knob on the side of the microscope used to fine-tune the focus of your specimen.
4) Coarse Adjustment Knob:
Of the two knobs on the side of a microscope, it is the largest. It is used to focus on the specimen. Always focus with the coarse knob first.
5) Objective Lenses
Most microscopes have 2, 3, or more lenses that magnify at different powers. Always start with the lowest power and work your way up to the strongest when examining a specimen. The shortest lens is usually the lowest power.
It’s where the sample or specimen is placed for examination.
7) Iris Diaphragm:
It’s what allows you to control the amount of light on the specimen that comes through the stage.
8) Light Source:
It can be a bulb or a mirror, and is usually found near the base of the microscope shining up through the stage.
It’s the hole in the stage that allows light through for better viewing of the specimen.
Multi celled organisms have numerous cells that come in different shapes to perform a variety of jobs.
Structures in cells are called organelles. Every organelle has at least one role to play in the activities necessary for life. A plant’s cell structure and an animal’s cell structure’s organelles are different. An animal’s cell doesn’t have chloroplast while a plant’s cell does. Plants need chloroplast because photosynthesis takes place in the chloroplast, and photosynthesis is how plants get food and energy. Animals find food to get energy, so they don’t need the process of photosynthesis, so they don’t need chloroplast in their cells. Plants also have a cell wall(a rigid wall that lets a plant stand, like a skeleton) and animals have a skeleton so they don’t have a cell wall.
What variations do we find in the structure and function of living things?
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