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lozanna [386]
3 years ago
15

Do brain cells live longer than all of the cells in your body

Biology
1 answer:
quester [9]3 years ago
3 0

Answer:

yes

Explanation:

Brain cells can live at least twice as long as the organisms in which they reside, according to new research.

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Meselson and Stahl used density labeling of DNA to show that DNA replication occurs via a semiconservative mechanism. In their e
cricket20 [7]

Answer:

  • The organism previously used 15N for replication so all the DNA molecules were of 15N15N type. Then the organism is shifted to a medium where only 14N is available for replication.
  • According to semi conservative mode of replication, a newly synthesised DNA molecule consists of one new strand and one parental strand. So after the first round of replication, All the 15N strands will synthesise new DNA strands using 14N resulting into intermediate 15N14N DNA molecules. Hence, only one band would be observed (15N14N) above the original 15N15N band since 15N14N has lighter isotope too so it will be lighter than 15N15N molecules and will lie above it.
  • After second round of replication, 15N strand from 15N14N would synthesise another 14N strand. 14N strand from 15N14N molecules will also synthesise another 14N strand. So now, 50% of the DNA molecules will be of 15N14N intermediate type and 50% of them will be of 14N14N type.Two bands will be observed above the original 15N15N band. One band of 15N14N molecules will be right above it and other band of 14N14N molecules will be even higher because it is the lightest band since it has only the lighter isotope of nitrogen.
8 0
3 years ago
If anna had a child with a man with sickle cell anemia, predict whether that child would also have sickle cell anemia. draw out
borishaifa [10]

The child has a 100% chance of having Sickle Cell Disease

Download pdf
7 0
3 years ago
if your fathers dominant gene was blond hair, but your mother's dominant gene was brown hair, what would the Childs hair color b
barxatty [35]

Answer:

Brown Or a Hazel color because a lot of kids come out with brown/hazel hair so I'm pretty sure Brown Or Hazel color

Explanation:

Ok

7 0
3 years ago
Which limiting factor would decrease the carrying capacity of any ecosystem without it?
Helen [10]

Answer:

Forests

Explanation:

Without forests the carrying capacity of an ecosystem would decrease because there would be a smaller number of habitats for wildlife.

hope this helps

6 0
3 years ago
Why can the sphenoid bone be called the keystone of the cranial floor?
NeTakaya
The sphenoid bone<span> has been </span>called the 'keystone' of the cranial floor<span> because it is in contact with all of the other </span>cranial bones<span>.</span>
6 0
3 years ago
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