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bonufazy [111]
3 years ago
13

The Gulf of Mexico dead zone is an area of hypoxic waters at the mouth of the Mississippi River. Its area varies in size, but ca

n cover up to 6,000-7,000 square miles. The zone occurs between the inner and mid-continental shelf in the northern Gulf of Mexico, beginning at the Mississippi River delta and extending westward to the upper Texas coast. Thousands of farms are located along the Mississippi River and its tributaries and as water washes into the river after a heavy rain, it brings with it nutrients from fertilizers added to farmland. These materials flow downriver and eventually enter the Gulf of Mexico, where they create conditions for a dead zone: an area of low to no oxygen that results in the death of fish and other marine life. The Gulf of Mexico is a major source area for the seafood industry. The Gulf supplies 72% of U.S. harvested shrimp, 66% of harvested oysters, and 16% of commercial fish. Consequently, if the hypoxic zone continues or worsens, fishermen and coastal state economies will be greatly impacted. What can be done to minimize the Gulf dead zone? Choose ALL that could apply. A) Control of animal wastes so that they are not allowed to enter into waterways. B) Adjust the timing of fertilizer applications to limit runoff of excess nutrients from farmland. C) Monitor septic systems and sewage treatment facilities to reduce discharge of nutrients to surface water and groundwater. D) Restrict land use in the areas surrounding the Mississippi delta to exclude industrial sites. E) Counter the effects of fertilizers on algal growth in the Gulf with the use of chemical herbicides.
Biology
2 answers:
miskamm [114]3 years ago
7 0
This Is Confusing Could U put more Details
creativ13 [48]3 years ago
6 0

Answer:

a, b, and c

Explanation: i did it on usatestprep.

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Please answer!!! <br> A b c or d
agasfer [191]

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Cystic fibrosis is the most common lethal genetic disease among Caucasians. with cystic fibrosis produce a mutated chloride (Cl-
jekas [21]

Answer:

The correct answer would be - 100% chances that their child will not have the disease.

Explanation:

Cystic fibrosis is one of the lethal diseases that inherited in an autosomal recessive manner. The Autosomal recessive pattern takes place when the defected gene present in the autosome chromosomes of an individual and only exhibits when both copies of recessive gene present.

The affected person must have two copies of the recessive allele - cc and the gamete he will produce will be - c only, however in the normal person, both copy of allele must be dominant - CC and will produce the gamete - C only.

Then from Punnett square :

                                            C       C         (normal parent)

(affected parent)   c         <em> Cc      Cc</em>

                                c          <em>Cc     Cc</em>

By this, it is established that in case all the offspring will have one copy of dominant and one copy of recessive gene which means 100% chances of carrier child.

Thus, the correct answer would be - 100% chances that their child will not have the disease.

7 0
3 years ago
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