The hunter gatherer are wandering food collectors.
The hunter gatherer affected their environment by setting fire to prairies. They do this in order to have open fields that will be convenient for their hunting activities. Hunter gatherer brought about extinction of many big animals due to over hunting.
Hi
It is true that the point of entry of a pathogen inside a body hold importance for the spread of pathogen. However, <em>organ and tissue specific manifestation is the real impact of a pathogen in any organism's body. Firstly we need to understand what is meant by Organ and tissue specific manifestation:</em>
It means that the specific organ or specific tissue is when affected by the entry of microbes or pathogens in the body, For example: The bacteria that cause tuberculosis enters the body through nose but manifests its action in lungs when multiplies there and affects the lungs' functionality and ultimately, depict the symptoms such as shortness and difficulty of breathing, this is basically organ specific manifestation.
Moreover, thee are some microbes that enter the body and damage certain tissues, for example HIV virus enters the body through sexual organs and travels to different tissues like nerve tissues, lymphatic system and damage them in a way that body's own immune system when counter reacts the microbes, it causes inflammation in the body and damage to overall tissues, This is called Tissue specific manifestation.
Hope it helps!
The correct answer is option C, species evolve rapidly
Reason -
In adaptive radiation, the ancestral species diversifies at a fast rate and results into new species which have resulted due to changing climatic and environmental conditions. For example the mammals, reptiles, birds etc. all evolved from the dinosaurs after their extinction. The major impacts of adaptive radiation can be visualized when an organism moves to a new area and therefore transforms to survive.
The best way to do a observation can be a microscope or by taking notes ,and by , taking pictures or, asking questions about the subject that you and the teacher or you, your teacher and the class is talking about .! Hope this helps ..