I am not 100% sure but I thinking it responds when pathogens enter the body because the immune system is meant to protect your body from illness.
Answer:
Mycorrhiza is a symbiotic association in between the green plants and fungus.
The micorrhiza are located in the roots of the vascular plants. The Green plants performs the process of photosynthesis and the sugars produced are supplied to the Micorrhizas.
The fungus supplies the nutrients, water such as phosphorus that is absorbed from the soil to the plant body.
<span>Light energy is absorbed by chlorophyll, a green substance found in chloroplasts in some plant cells and algae. Absorbed light energy is used to convert carbon dioxide (from the air) and water (from the soil) into a sugar called glucose. Oxygen is released as a by-product. - BBC</span>
Answer:
Drought in this region is frequent, lasting one to two months on average, and ... Prairie grasslands extend eastward from the Canadian Rockies to the ... The extreme nature of climate on the prairies was first highlighted in relation to ... prairies, a well-defined gradient existed in Tmn, extending from a high of around −12.5 °C
