Answer: The immune system
Explanation:
The immune system is a complex network of proteins and cells that defends the body against infection or any invasion. The human defense system in the body is actually made up of entire organs and vessel systems like the lymph vessels. The immune system is made up of organs that control the production and maturation of certain defense cells.
Initially, all living things are subjected to attack from disease causing agents. Even bacteria, so small that more than a million could fit on the head of a pin, have systems to defend against infection by viruses. This kind of protection gets more sophisticated as organisms become more complex.
Answer: They limited the rights and freedoms of African Americans.
Answer:
1: Organisms that make energy are called producers.
Producers are the autotrophic or chemotrophic organisms which are capable of synthesizing their food either by photosynthesis or by chemosynthesis. In the process of photosynthesis organisms use sunlight as a source of energy to convert water and carbon dioxide into carbohydrates and oxygen. Also some simple organisms use chemical energy obtained by chemical inorganic substances and convert them as organic chemical substances to obtain them as food.
2: A decomposer recycles matter back into the food web and biogeochemical cycles.
A decomposer is an organic which feed upon dead decaying organic matter generated after the death of plants and animals. This process results in the simplification of organic matter into simpler substances which are again absorbed by the plants through soil.
3. The sun is the source of energy. The light energy from sun is converted into chemical energy in the form of food by the producers like plants.
4. The autotrophs are found at the base of a food pyramid.
The autotrophs are called as producers because they are capable of synthesizing their own food by the process of photosynthesis . The diversity of producers in nature is more as compared to other organisms therefore, it lies at the base of the food chain.
Explanation:
<span>Chlorophyll is any of many closely related green pigments found in cyanobacteria and the chloroplasts of algae and plants, and the function of it is that is absorbs energy from light.</span>
