a scientific model is a model used to test theories. sometimes scientist use rats as a scientific model
<span>It should be streptococci</span>
A substance that provides nourishment essential for the maintenance of life and for growth.
If you do not gain enough nutrients, a nutritional deficiency occurs (when the body doesn't absorb or get from food the necessary amount of a nutrient). Deficiencies can lead to a variety of health problems. These can include digestion problems, skin disorders, stunted or defective bone growth, and even dementia.
Answer:
you should have skills of drawing observe the diagram
Environmental, agricultural, and natural ecosystems.