Answer:
Spanning 5 US states and 2 Canadian provinces, the Northern Great Plains is one of the largest prairie grasslands in the world. Despite habitat and species loss, opportunities exist to conserve and restore remaining large areas of this unique ecosystem.
Explanation:
No we ban them for protection purposes so that ordinary scientists and citizens cant get their hands on them and use them against our own populous
Answer:
The action that you must take would be to turn your vessel around to avoid the risk of collision.
Explanation:
Answer:
Engrossing one's self in work so that the feeling of productivity is enhanced
Explanation:
Our immune system is essential for our survival. Without an immune system, our bodies would be open to attack from bacteria, viruses, parasites, and more. It is our immune system that keeps us healthy as we drift through a sea of pathogens.
This vast network of cells and tissues is constantly on the lookout for invaders, and once an enemy is spotted, a complex attack is mounted.
The immune system is spread throughout the body and involves many types of cells, organs, proteins, and tissues. Crucially, it can distinguish our tissue from foreign tissue — self from non-self. Dead and faulty cells are also recognized and cleared away by the immune system.
If the immune system encounters a pathogen, for instance, a bacterium, virus, or parasite, it mounts a so-called immune response. Later, we will explain how this works, but first, we will introduce some of the main characters in the immune system.
