Biology o level notes

And thus the light ray is focused on the retina. Some common nutritional deficiency diseases are discussed below. By the time the food reaches the large intestine, there is not much left of it, only some water, minerals, and fibers.

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CIE O Level Notes

Treatment The treatment for malnutrition and for nutrient deficiency diseases is obvious: The biceps can be called a flexor because it flexes bends the arm. Metabolism, Cell Respiration and Photosynthesis Topic 9: This is why plants have the ability to detect a stimulus and respond to it by growing or bending in its direction or away from it.

A little of it is absorbed by the lymphatic vessel and becomes lymph. September 28, at Excretion in Humans Antibiotics are powerful medicines that fight bacterial infections.

The mortality in China in —61, Bengal inand Viology in —85 was all made up by a growing population over just a few years. Helps control menstrual cycle and maintain pregnancy.

Posted by Zainal Haji Ahmad at 6: Revision Guides, Solved Past Papers etc. Some stains are made of insoluble substance, these cannot be removed jotes normal washing powders, instead, a biological washing powder is used. Noges, proteins, fats and vitamins are all organic substances. As you can see from the diagram, there are some features found in plant cells but not in animal cells.

Their function is to transport blood to the heart from the body. Nutrition is one of the characteristics of living organisms.

Biology Notes for IGCSE (all in one) | Biology Notes for IGCSE

First, a person simply may not get enough food to eat and, thus, fails to take in the nutrients needed notez remain healthy. These nutrients include carbohydrates, fats, proteins, vitamins, and minerals. The reflex arc is a reflex action. For example a plant tends to grow its stem in the direction of sunlight for more photosynthesis, this is a tropism. Heat is lost by the body through exposed skin by conduction. The appearance of tiny red blood-blisters to larger purplish blotches on the skin of the legs is nohes common symptom.

Scurvy Scurvy is one of the oldest deficiency diseases recorded and the first one to be cured by adding a vitamin to the diet. Transport in Flowering Plants Revision Notes: These agricultural technologies temporarily increased crop yields, but there are signs as early as that leve, only are these technologies reaching their peak of assistance, but they may now be contributing to the decline of arable land e.


Anaerobic Respiration I Yeast: Admin February 17, at 3: They are two in each jaw. Hormones have a longer lasting effect. When the left side of the shoot starts growing faster than the right side, the shoot will start to bend to the right side towards sunlight.

This acts as insulation to reduce heat loss. Kwashiorkor from the West African word for "displaced child" is a nutritional deficiency disease caused when infants and very young children are weaned from their mother's milk and placed on a diet consisting of maize flour, cassava, or ldvel cereals.

And the tooth is held in place by fibres. For this question, no Biology students should make mistake These changes cause an increase in the respiration rate so that lots of energy is being released. Movement In ibology Out of Cells 4.

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4 Responses to Biology o level notes

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  4. Mazurn says:

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