The two factors about the ecology of the great plains did farmers fail to understand
The role the native grasses played in the environment
That local weather patterns were subject to periodic drought
<h3>What factors about the ecology of the great plains did farmers fail to understand?</h3>
- Environmental change has been significantly less drastic than the two-thirds of the grassland that farmers were unable to successfully plow for crops.
- The majority of such area still has native vegetative cover, despite the fact that virtually all of it has been extensively grazed by cattle and in much smaller amounts by sheep and horses.
- Two key climatic gradients—an east-west gradient of increasing precipitation and a north-south gradient of increasing temperature—which both produce drought—control the spread of both natural ecosystems and land use management.
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Toxic water quality in the Klamath River is a direct result of both upper basin agricultural development (the draining of wetlands and intense chemical use), and the presence of PacifiCorp's dams, creating warm, stagnant pools for algae to develop. Massive algae pools in Upper Klamath Lake.
Answers: examples of host defence mechanism include: Innate anatomical and physiological barriers, Innate cellular and chemical defenses.
Explanation:
The capability of the human body to resist almost all types of organisms or toxins that tend to damage the tissues and organs is known as IMMUNITY. This host defence mechanism can be classified into INNATE or adaptive immunity.
The immunity that results from general processes, rather than from processes directed at specific disease organisms is called the INNATE IMMUNITY. The anatomical and physiological barriers of the innate immunity provides the first line of defence against pathogens. Examples of these barriers of the innate immunity includes:
--> Destruction of swallowed organisms by the low stomach pH and digestive enzymes
--> The vigorous mucociliary clearance mechanisms of the respiratory airways and lungs.
--> Resistance of the skin to invasion by organisms
While examples of innate cellular and chemical defenses include:
--> Phagocytosis of bacteria and other invaders by white blood cells and cells of the tissue macrophage System
--> lysozymes, a mucolytic polysaccharide that attacks bacteria and cause them to dissolute.
--> basic polypeptides which react and inactivate certain types of gram- positive bacteria
-->natural killer lymphocytes that can recognize and destroy foreign and tumor cells.
Answer:
it keeps the organelles in the cell and gives hydration
Explanation:
