<u>ANSWER:</u>
Ogallala aquifer supplies "one-third of the irrigation water" in the United States.
<u>EXPLANATION:</u>
- The "Ogallala aquifer" is located in the "Great Plains of the United States" and therefore gives life to almost all fields of the US.
- The aquifer supplies water for one-third irrigation needs of the United States. The Ogallala is an underground reservoir and is very big in size and the agriculture production in the US is dependent on this aquifer.
- The aquifer is however depleting and water level in many areas has become very low.
- It is important for United States to protect and preserve this aquifer so that the agricultural production does not suffer.
Answer:
B) All DNA molecules will migrate up the gel toward the positive electrode.
Explanation:
Because the DNA has a negative charge - regardless the size-, all DNA molecules will migrate towards the positive electrode, at the top of the gel. This is due to the Coulomb's physic law "force of the interaction between the charges is attractive if the charges have opposite signs".
Instead of migrate down the gel , the DNA will do migrate up the gel (opposite direction).
Answer:
A series circuit
Explanation:
In a series circuit, the current is the same everywhere.
Water, soil, sunlight, H20, and nutrients.
Answer:
The nitrogen gas must be changed to a form called nitrates, which plants can absorb through their roots. The process of changing nitrogen gas to nitrates is called nitrogen fixation. It is carried out by nitrogen-fixing bacteria. The bacteria live in soil and roots of legumes, such as peas.
