The picture is a scientific model which is used to explain the concept of the water cycle by means of pictures and descriptions.
<h3>What is a scientific model?</h3>
A scientific model is a representation which may be in form of pictures, illustrations, objects, or ideas which are used to explain a particular concept by scientists.
Scientific models are usually employed to explain either difficult to understand concepts or scarcely observable phenomena in order to enrich the knowledge and comprehension of others.
The given illustration is an example of a scientific model. It is used to explain the concept of the water cycle. By means of pictures and descriptions, the various processes of the water cycle can be fully comprehended.
Also, by means of a cyclical illustration, the model helps to explain that the water cycle is a continuous repetitive process.
In conclusion, scientific models may be in form of pictures, illustrations or objects.
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When Linnaeus developed his system of classification, there were only two kingdoms, Plants and Animals. But the use of the microscope led to the discovery of new organisms and the identification of differences in cells. A two-kingdom system was no longer useful. Today the system of classification includes six kingdoms.
Answer:
a cat's leg, and a human arm are considered homologous structures.
Explanation:
same joints
muscles are in the same places
In addition to loss of muscle mass, inadequate calorie intake can lead to loss of bone density and an increased risk of fatigue, illness, injuries and poor recovery.
<h3>Why is it important to consume adequate calories?</h3>
- When your consumption of calories is not adequate, your body will not get all the necessary nutrients.
- It slows down the metabolism so as to conserve energy
- Calorie restriction can lead to reduce in leptin, a hormone that regulates appetite.
- Lower levels of leptin can lead to increase in hunger thus a person overeats. This results in increase in body weight.
- Low-calorie dieting increases stress and results in the release of the stress hormone (cortisol).
- Due to response to stress, the body conserves energy and the metabolism slows to combat the risk of starvation.
- Therefore, it is important to consume appropriate amount of calories and nutrients.
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