The greatest source of both nitrogen and phosphorus entering most estuaries, such as chesapeake bay, is ________.

Biology

2 answers:

mr_godi [17]2 years ago

6 0

Answer;

Agriculture

Agriculture is the major source of both nitrogen and phosphorus entering most estuaries, such as chesapeake bay.

Explanation;

The largest source of pollution to the Bay comes from agricultural runoff, which contributes roughly 40 percent of the nitrogen and 50 percent of the phosphorus entering the Chesapeake Bay.

-Agricultural practices including over-irrigating farmland, over-tilling soil and over-applying fertilizers and pesticides, can push pollution into the Bay and its local waterways. Agriculture is the single largest source of nutrient and sediment pollution entering the Chesapeake Bay. The fastest growing source of nitrogen pollution to the Bay is polluted runoff.

Sergio039 [100]2 years ago

3 0

The Chesapeake bay is an estuary in United States. The presence of nitrogen and phosphorus in the estuary can cause harm to the aquatic species present there.

The main source of nitrogen in the Chesapeake bay is the agricultural runoff. The pesticides and the herbicides used in the agriculture may come along the runoff and get mixed with large rivers and water bodies. The nitrogen from agricultural runoff accounts approximately 40% of the total sources of nitrogen.

Hence, the correct answer is agricultural runoff.

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A genetic disorder in which part of the X chromosome seems to be attached to the rest of it by a very thin string of molecules i

Jlenok [28]

Answer:

fragile X syndrome 

Explanation:

FMR1 gene mutations trigger fragile X syndrome.The gene FMR1 offers instructions on how to make a protein called FMRP.

This gene helps to control the output of other proteins and plays a part in the growth of synapses that are specific nerve cell connections.

It creates a variety of developmental issues including intellectual disabilities and cognitive impairment. This disease usually affects males more significantly than women.

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3 years ago

Glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as an X-linked recessive allele in humans. A woman whose father

prohojiy [21]

Answer:

(a) 1/2; (b) no

Explanation:

Glucose-6-phosphate dehydrogenase deficiency (G6PD) is an X-linked recessive disorder and the woman's father was diseased so it means that woman is a carrier of the allele but has normal phenotype. It means that she will have XXᵇ genotype.

In contrast to this, her husband is diseased so his genotype will be XᵇY.

The Punnett square diagram related to the cross is attached.

(a) Proportion of their sons expected to be G6PD is 1/2:

They both may give birth to 4 progeny with genotypes XXᵇ, XᵇXᵇ, XY and XᵇY. It means they both may have 2 sons out of which one with genotype XᵇY will be diseased while the one with genotype XY will be healthy. So the proportion of their sons having G6PD is 1/2 or 50%.

(b) If the husband were G6PD deficient, the answer will not change.

The reason behind this is that this disease is caused by an allele located in X chromosome. But father contributes only Y chromosome to his son not X chromosome. The X chromosome will affect the genotype of his daughter not son that is why answer will not change. It means they will still have 1/2 of their sons diseased.