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kumpel [21]
3 years ago
6

Do​ individual chromosomes mean paired chromosomes or unpaired chromosomes?

Biology
1 answer:
uysha [10]3 years ago
4 0

believe paired chromosomes .......

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Parkinson disease is associated with demyelination of CNS neurons. a pyramidal nerve tract lesion. insufficient production of ac
Pepsi [2]

Answer:

The correct option is: <em>a deficiency of dopamine in the substantia nigra.</em>

Explanation:

The substantia nigra is the principal site involved in the physiopathology of Parkinson´s disease.

Cells from this area degenerate and die progressively causing important degeneration in the central nervous system. The cells that die -with no known reason- are those that produce dopamine and proportionate dopaminergic innervation to the encephalon. In fact, almost all the symptoms exhibited by patients with the disease can be explained by the lack of dopamine in the substantia nigra.  

This area uses the neurotransmitter to communicate neurons from the base ganglia. Ganglia are responsible of modulating and modifying movements.

The nigrostriatal system participates in planning and automatic execution of learned movements. When the ganglia activity decreases, so it does the amount and velocity of movements, something typical of the disease.  

3 0
3 years ago
Which of the following correctly lists the kingdoms of life scientists currently use
Greeley [361]
Kingdoms are Archaebacteria, Eubacteria, Protista, Fungi, Plantae, and Animalia.

I'm not sure if these 6 kingdoms I listed are one of the"which of the following"options you asked for so I hope it helps.
3 0
3 years ago
Why it is not surprising that some species can interbreed with one another while others can not?
andrezito [222]
Due to divergent evolution, some species may have similar anatomical structures with the same purposes. The species while not exactly similar are close enough to allow the interbreeding of the two, such as the horse and mule
4 0
3 years ago
In fruit flies, straight wings are dominant and curly wings are recessive. What will the generations look like? Assume that Mend
Anestetic [448]
Crossing two true breeding parents with opposite parents is the key:

Assume W is straight wing and w is curly.
Then you are crossing WW with ww
This will result in ALL Ww as offspring - so all straight offspring

If you then cross Ww x Ww you end up with a mix of 
WW (1), Ww (2) and ww (1) - so a mix of straight and curly

Answer: 
P generation has straight wings and curly wings
F1 has all straight wings
F2 has straight wings and curly wings
8 0
3 years ago
How do decaying organisms affect the health of ecosystem?
forsale [732]
Decaying organisms help with the soil that grass grows on.
6 0
3 years ago
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