Answer:
Dust bowl resulted from extreme drying and loosening of the soil that resulted in soil erosion by wind. Thus, it can be related that poor agricultural practices like over plowing , over grazing and leaving the land barren are human activities that must have contributed to the dust bowl.
Explanation:
- Dust bowl is referred to a period in early twentieth century when the the American and Canadian prairies faced severe dust storms.
- These dust storms resulted from severe drought and failure of practices to prevent soil erosion.
- Several people and livestock died as a result of choking.
- Over plowing, removal of top soil and small grasses exposed the soil to eroding winds and caused the dust storms.
Answer:
The correct answer will be option-C
Explanation:
Mammals are warm-blooded animals that are they need to maintain the internal temperature irrespective of the external temperature at a constant rate or 37° C.
In cold conditions the person exposing the body parts to cold conditions response either by producing heat or conserving the heat in the body.
If a person removes the gloves, then a physiological change leads to the change in the diameter of the blood vessels. The diameter of the blood vessels reduces which reduces the loss of heat from the body as constriction of the blood vessels decreases the surface area to be exposed to cold conditions.
Thus, Option-C is the correct answer.
It is a beneficial adaptation since the pressurized seeds and spores spread widely, helping the organism reproduce elsewhere. In plants, it allows them to survive better by flinging the seeds far away so that their offspring don’t compete for food. For the fungus, it allows the parent to fling the spores into the grass so that when other animals eat them, the life cycle of the fungus continues on. These may be dispersed by the wind.
The oldest layers are on the bottom, and the youngest layers are on the top.
Hi , energy conservation is the practice of decreasing the quantity of energy used. The conservation of energy states that energy may neither be created nor destroyed. Therefore the sum of all the energies in the system is a constant.
