Natural resources are derived from the environment. Some of the resources are essential to survival, while others merely satisfy societal wants. Every man-made product in an economy is composed of natural resources to some degree.
There are numerous ways to classify the types of natural resources, they include the source of origin, the state of development, and the renewability of the resources.
Over the next decade the Ogallala aquifer will be completely depleted and will affect portions of the central and southern High Plains Aquifer (HPA). The Ogallala Aquifer is one of the largest bodies of water in the United States and is is generally used by farmers for irrigation of crops. As the continuous depletion of the aquifer occurs, it may become problematic for agricultural industries to sustain their farming.
Answer: pachytene stage of prophase I
Explanation:
The processes of crossing over is called synapsis and it occurs at the pachytene stage of prophase I of meiosis.